功能介绍html
绘制出图形界面，支持鼠标点击实现四则运算(可带括号),同时具备清零和撤回操做。另一种模式，能够绘制一些特定的函数图像。windows
代码实现数组
1 #include<stdio.h> 2 #include<stdlib.h> 3 #include <graphics.h> 4 #include <windows.h> 5 #include <conio.h> 6 #include <string.h> 7 #include<math.h> 8 9 #define PI 3.1415926 10 #define N 100 11 12 typedef struct 13 { 14 char data[N][N]; 15 int top; 16 17 }stack; 18 19 typedef struct figure 20 { 21 char x[N]; 22 }figure; 23 24 const int max = 100; 25 int q; //定义一个全局变量，用来计数结构体数组的数量； 26 int count = 0; 27 char str[N] = { '0' }; //字符数组赋初始值； 28 figure st[N]; 29 char suffix[N][N] = { '0' }; 30 stack sta; 31 int select_; //用户选择 32 33 34 void gotoxy(int x, int y); 35 void hidecursor(); 36 void introduce(); 37 void calcul_memu(); 38 void mouse_imfor(); 39 void clear_cal(); 40 void chuli(char ch[], struct figure a[]); 41 void init(stack *sta); 42 void suffixtoresult(stack *sta, char suffix[][N], int length); 43 void inffixtosuffix(stack *sta, struct figure *a, char suffix[][N], int *length); 44 45 void image_menu(); 46 47 void function1(); 48 void function2(); 49 void function3(); 50 void function4(); 51 void function5(); 52 void function6(); 53 void function7(); 54 void function8(); 55 void function9(); 56 void function10(); 57 void creatCoordinate(); 58 59 int main() 60 { 61 introduce(); 62 switch (select_) 63 { 64 case 1: 65 { 66 initgraph(480, 600); //设置窗口的大小； 67 setbkcolor(BLACK); //设置背景色为黑色； 68 cleardevice(); //用背景色来清空屏幕； 69 calcul_memu(); 70 mouse_imfor(); 71 closegraph(); 72 break; 73 } 74 case 2: 75 { 76 image_menu(); 77 break; 78 } 79 default: 80 break; 81 } 82 } 83 void gotoxy(int x, int y)//函数gotoxy:定义光标位置 84 { 85 COORD coord;//坐标系coord 86 HANDLE handle; 87 88 coord.X = x;//横坐标X 89 coord.Y = y;//纵坐标 y 90 handle = GetStdHandle(STD_OUTPUT_HANDLE); 91 SetConsoleCursorPosition(handle, coord); 92 }//end gotoxy 93 94 void hidecursor()//函数hidecursor：隐藏光标 95 { 96 CONSOLE_CURSOR_INFO curinfo; 97 HANDLE Out; 98 99 Out = GetStdHandle(STD_OUTPUT_HANDLE); 100 curinfo.dwSize = 1;//光标百分比厚度：1~100 101 curinfo.bVisible = 0;//是否可见 102 SetConsoleCursorInfo(Out, &curinfo); 103 } //end hidecursor 104 105 //打印欢迎界面 106 void introduce() 107 { 108 int i; 109 HANDLE consolehwnd;//建立句柄 110 consolehwnd = GetStdHandle(STD_OUTPUT_HANDLE); 111 SetConsoleTextAttribute(consolehwnd, FOREGROUND_INTENSITY | FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE); 112 //设置为亮白色 113 114 for (i = 14; i < 39; i++) 115 { 116 gotoxy(i * 2, 4); 117 printf("■"); 118 } 119 120 for (i = 5; i < 20; i++) 121 { 122 gotoxy(28, i); 123 printf("■"); 124 gotoxy(76, i); 125 printf("■"); 126 } 127 128 gotoxy(45, 5); 129 printf("欢迎来到计算器!"); 130 131 for (i = 15; i < 38; i++) 132 { 133 gotoxy(i * 2, 6); 134 printf("■"); 135 } 136 137 gotoxy(45, 7); 138 printf("计算器控制台"); 139 140 for (i = 15; i < 38; i++) 141 { 142 gotoxy(i * 2, 8); 143 printf("■"); 144 } 145 146 gotoxy(35, 9); 147 printf("1.计算 实现加减乘除运算（支持括号）"); 148 149 gotoxy(37, 10); 150 printf("按'C'清屏，按'>'撤退一个"); 151 152 gotoxy(35, 11); 153 printf("2.画图 基本函数类型"); 154 gotoxy(37, 12); 155 printf("按右键退出"); 156 gotoxy(35, 13); 157 printf("3.开始使用 按1进入计算，按2进入画图"); 158 gotoxy(37, 14); 159 printf("按0退出"); 160 161 162 for (i = 15; i < 38; i++) 163 { 164 gotoxy(i * 2, 17); 165 printf("■"); 166 } 167 168 for (i = 14; i < 39; i++) 169 { 170 gotoxy(i * 2, 20); 171 printf("■"); 172 } 173 174 gotoxy(51, 19); 175 scanf_s("%d", &select_); 176 fflush(stdin); 177 178 getchar(); 179 system("cls"); 180 } 181 182 //打印计算器界面 183 void calcul_memu() 184 { 185 setfillcolor(BLACK); 186 solidrectangle(0, 100, 480, 600); 187 188 setcolor(DARKGRAY); 189 line(0, 100, 480, 100); 190 line(0, 200, 480, 200); 191 line(0, 300, 480, 300); 192 line(0, 400, 480, 400); 193 line(0, 500, 480, 500); 194 line(120, 100, 120, 600); 195 line(240, 100, 240, 600); 196 line(360, 100, 360, 600); 197 198 settextstyle(60, 60, _T("宋体")); 199 outtextxy(30, 120, _T("(")); 200 outtextxy(150, 120, _T(")")); 201 outtextxy(390, 120, _T("+")); 202 outtextxy(30, 220, _T("7")); 203 outtextxy(150, 220, _T("8")); 204 outtextxy(270, 220, _T("9")); 205 outtextxy(390, 220, _T("-")); 206 outtextxy(30, 320, _T("4")); 207 outtextxy(150, 320, _T("5")); 208 outtextxy(270, 320, _T("6")); 209 outtextxy(390, 320, _T("*")); 210 outtextxy(30, 420, _T("1")); 211 outtextxy(150, 420, _T("2")); 212 outtextxy(270, 420, _T("3")); 213 outtextxy(390, 420, _T("/")); 214 outtextxy(30, 520, _T(".")); 215 outtextxy(150, 520, _T("0")); 216 outtextxy(390, 520, _T("=")); 217 outtextxy(260, 120, _T("<")); 218 outtextxy(270, 520, _T("C")); 219 } 220 221 //处理鼠标消息 222 void mouse_imfor() 223 { 224 int length = 0; 225 int i = -1; 226 int go = 0; 227 for (int a = 0; a < N; a++) 228 strcpy(st[i].x, "0"); 229 MOUSEMSG m; 230 while (go == 0) 231 { 232 setcolor(DARKGRAY); 233 settextstyle(60, 20, _T("宋体")); 234 m = GetMouseMsg(); 235 switch (m.uMsg) 236 { 237 case WM_LBUTTONDOWN: 238 if (m.x > 0 && m.x < 120 && m.y>100 && m.y < 200) 239 { 240 ++i; count++; 241 str[i] = '('; 242 } 243 if (m.x > 120 && m.x < 240 && m.y>100 && m.y < 200) 244 { 245 ++i; count++; 246 str[i] = ')'; 247 } 248 if (m.x > 240 && m.x < 360 && m.y>100 && m.y < 200) 249 { 250 i--; 251 count--; 252 outtextxy(460 - i * 20, 20, _T(str)); 253 outtextxy(460 - (i + 1) * 20, 20, _T(" ")); //按'<'键清除后一个，日后退； 254 } 255 if (m.x > 360 && m.x < 480 && m.y>100 && m.y < 200) 256 { 257 ++i; count++; 258 str[i] = '+'; 259 } 260 if (m.x > 0 && m.x < 120 && m.y>200 && m.y < 300) 261 { 262 ++i; count++; 263 str[i] = '7'; 264 } 265 if (m.x > 120 && m.x < 240 && m.y>200 && m.y < 300) 266 { 267 ++i; count++; 268 str[i] = '8'; 269 } 270 if (m.x > 240 && m.x < 360 && m.y>200 && m.y < 300) 271 { 272 ++i; count++; 273 str[i] = '9'; 274 } 275 if (m.x > 360 && m.x < 480 && m.y>200 && m.y < 300) 276 { 277 ++i; count++; 278 str[i] = '-'; 279 } 280 if (m.x > 0 && m.x < 120 && m.y>300 && m.y < 400) 281 { 282 ++i; count++; 283 str[i] = '4'; 284 } 285 if (m.x > 120 && m.x < 240 && m.y>300 && m.y < 400) 286 { 287 ++i; count++; 288 str[i] = '5'; 289 } 290 if (m.x > 240 && m.x < 360 && m.y>300 && m.y < 400) 291 { 292 ++i; count++; 293 str[i] = '6'; 294 } 295 if (m.x > 360 && m.x < 480 && m.y>300 && m.y < 400) 296 { 297 ++i; count++; 298 str[i] = '*'; 299 } 300 if (m.x > 0 && m.x < 120 && m.y>400 && m.y < 500) 301 { 302 ++i; count++; 303 str[i] = '1'; 304 } 305 if (m.x > 120 && m.x < 240 && m.y>400 && m.y < 500) 306 { 307 ++i; count++; 308 str[i] = '2'; 309 } 310 if (m.x > 240 && m.x < 360 && m.y>400 && m.y < 500) 311 { 312 ++i; count++; 313 str[i] = '3'; 314 } 315 if (m.x > 360 && m.x < 480 && m.y>400 && m.y < 500) 316 { 317 ++i; count++; 318 str[i] = '/'; 319 } 320 if (m.x > 0 && m.x < 120 && m.y>500 && m.y < 600) 321 { 322 ++i; count++; 323 str[i] = '.'; 324 } 325 if (m.x > 120 && m.x < 240 && m.y>500 && m.y < 600) 326 { 327 ++i; count++; 328 str[i] = '0'; 329 } 330 outtextxy(460 - i * 20, 20, _T(str)); 331 if (m.x > 240 && m.x < 360 && m.y>500 && m.y < 600) 332 { 333 ++i; count++; 334 str[i] = 'C'; 335 } 336 str[i + 1] = '\0'; 337 if (m.x > 360 && m.x < 480 && m.y>500 && m.y < 600) 338 { 339 ++i; count++; 340 str[i] = '='; 341 str[i + 1] = '\0'; 342 } 343 344 Sleep(100); // 延时，下降 CPU 占用率 345 break; 346 case WM_RBUTTONUP: 347 go = 1; 348 break; 349 } 350 if (str[i] == 'C' || str[i] == '=') 351 break; 352 } //一次输入结束 353 354 if (str[i] == 'C') 355 { 356 setbkcolor(BLACK); 357 cleardevice(); 358 calcul_memu(); 359 mouse_imfor(); 360 }//按'C'键清空界面； 361 else if (str[i] == '=') 362 { 363 chuli(str, st); 364 init(&sta); 365 inffixtosuffix(&sta, st, suffix, &length); 366 setbkcolor(BLACK); 367 cleardevice(); 368 calcul_memu(); 369 init(&sta); 370 suffixtoresult(&sta, suffix, length); 371 372 go = 0; 373 while (go == 0) 374 { 375 m = GetMouseMsg(); 376 switch (m.uMsg) 377 { 378 case WM_LBUTTONDOWN: 379 if (m.x > 240 && m.x < 360 && m.y>500 && m.y < 600) 380 { 381 str[i] = 'C'; 382 } 383 str[i + 1] = '\0'; 384 break; 385 case WM_RBUTTONUP: 386 go = 1; 387 388 break; 389 } 390 if (str[i] == 'C') 391 break; 392 } 393 if (str[i] == 'C') 394 { 395 setbkcolor(BLACK); 396 cleardevice(); 397 calcul_memu(); 398 mouse_imfor(); 399 } 400 } 401 402 } 403 404 void clear_cal() 405 { 406 setbkcolor(BLACK); 407 calcul_memu(); 408 }//初始化界面; 409 410 //处理输入的算术表达式 411 void chuli(char ch[], struct figure a[]) 412 { 413 q = 0; 414 int m = 0, j; 415 char asd[15] = { '0' }; 416 while (m < count) 417 { 418 j = 0; 419 if (ch[m] == '=') 420 break; 421 if (ch[m] == '(' || ch[m] == ')') 422 { 423 asd[j] = ch[m]; 424 asd[j + 1] = '\0'; 425 m++; 426 strcpy_s(a[q].x, asd); 427 q++; 428 continue; 429 } 430 if (ch[m] == '+' || ch[m] == '-') 431 { 432 if (ch[m - 1] == '+' || ch[m - 1] == '-' || ch[m - 1] == '*' || ch[m - 1] == '/' || m == 0 || ch[m] == '(') 433 { 434 asd[j] = ch[m]; 435 m++; 436 j++; 437 while (ch[m] != '+'&&ch[m] != '-'&&ch[m] != '*'&&ch[m] != '/'&&ch[m] != ')') 438 { 439 asd[j] = ch[m]; 440 j++; 441 m++; 442 } 443 asd[j] = '\0'; 444 strcpy_s(a[q].x, asd); 445 q++; 446 } 447 else 448 { 449 asd[j] = ch[m]; 450 asd[j + 1] = '\0'; 451 m++; 452 strcpy_s(a[q].x, asd); 453 q++; 454 } 455 continue; 456 } 457 if (ch[m] == '*' || ch[m] == '/') 458 { 459 asd[j] = ch[m]; 460 asd[j + 1] = '\0'; 461 m++; 462 strcpy_s(a[q].x, asd); 463 q++; 464 continue; 465 } 466 if (ch[m] != '+'&&ch[m] != '-'&&ch[m] != '*'&&ch[m] != '/'&&ch[m] != '('&&ch[m] != ')') 467 { 468 while (ch[m] != '+'&&ch[m] != '-'&&ch[m] != '*'&&ch[m] != '/'&&ch[m] != '('&&ch[m] != ')'&&ch[m] != '=') 469 { 470 asd[j] = ch[m]; 471 j++; 472 m++; 473 } 474 asd[j] = '\0'; 475 strcpy_s(a[q].x, asd); 476 q++; 477 continue; 478 } 479 } 480 }//将字符串分割出来； 481 482 void init(stack *sta) 483 { 484 int i; 485 for (i = 0; i < max; i++) 486 strcpy_s(sta->data[i], "0"); 487 488 sta->top = -1; 489 }//初始化栈； 490 491 //中缀表达式变为后缀表达式 492 void inffixtosuffix(stack *sta, struct figure *a, char suffix[][N], int *length) 493 { 494 int i = 0; 495 int j = 0; 496 for (i = 0; i < q;) 497 { 498 if (strcmp(a[i].x, "(") == 0) 499 { 500 sta->top++; 501 strcpy_s(sta->data[sta->top], a[i].x); 502 i++; 503 continue; 504 } 505 else if (strcmp(a[i].x, ")") == 0) 506 { 507 while (strcmp(sta->data[sta->top], "(") != 0 && sta->top != -1) 508 { 509 strcpy_s(suffix[j], sta->data[sta->top]); 510 sta->top--; 511 j++; 512 } 513 strcpy_s(sta->data[sta->top], "0"); 514 i++; 515 sta->top--; 516 continue; 517 } 518 else if (strcmp(a[i].x, "=") == 0) 519 { 520 i++; 521 continue; 522 } 523 else if (strcmp(a[i].x, "+") == 0 || strcmp(a[i].x, "-") == 0) 524 { 525 while (strcmp(sta->data[sta->top], "(") != 0 && sta->top != -1) 526 { 527 strcpy_s(suffix[j], sta->data[sta->top]); 528 sta->top--; 529 j++; 530 } 531 sta->top++; 532 strcpy_s(sta->data[sta->top], a[i].x); 533 i++; 534 continue; 535 } 536 else if (strcmp(a[i].x, "*") == 0 || strcmp(a[i].x, "/") == 0) 537 { 538 while (strcmp(sta->data[sta->top], "(") != 0 && sta->top != -1 && strcmp(sta->data[sta->top], "+") != 0 && strcmp(sta->data[sta->top], "-") != 0) 539 { 540 strcpy_s(suffix[j], sta->data[sta->top]); 541 sta->top--; 542 j++; 543 } 544 sta->top++; 545 strcpy_s(sta->data[sta->top], a[i].x); 546 i++; 547 continue; 548 } 549 else 550 { 551 strcpy_s(suffix[j], a[i].x); 552 j++; 553 i++; 554 continue; 555 } 556 } 557 while (sta->top != -1) 558 { 559 strcpy_s(suffix[j], sta->data[sta->top]); 560 sta->top--; 561 j++; 562 } 563 *length = j; 564 565 } 566 567 //计算出后缀表达式的值 568 void suffixtoresult(stack *sta, char suffix[][N], int length) 569 { 570 int i = 0; 571 double result = 0; 572 while (i < length) 573 { 574 if (strcmp(suffix[i], "+") == 0) 575 { 576 printf("\n\nsta=%s\n\n", sta->data[sta->top]); 577 printf("\n\nsta=%s\n\n", sta->data[sta->top - 1]); 578 579 result = atof(sta->data[sta->top - 1]) + atof(sta->data[sta->top]); 580 sta->top--; 581 sprintf(sta->data[sta->top], "%.5lf", result); 582 i++; 583 continue; 584 } 585 else if (strcmp(suffix[i], "-") == 0) 586 { 587 result = atof(sta->data[sta->top - 1]) - atof(sta->data[sta->top]); 588 sta->top--; 589 sprintf(sta->data[sta->top], "%.8lf", result); 590 i++; 591 continue; 592 } 593 else if (strcmp(suffix[i], "*") == 0) 594 { 595 result = atof(sta->data[sta->top - 1])*atof(sta->data[sta->top]); 596 sta->top--; 597 sprintf(sta->data[sta->top], "%.8lf", result); 598 i++; 599 continue; 600 } 601 else if (strcmp(suffix[i], "/") == 0) 602 { 603 result = atof(sta->data[sta->top - 1]) / atof(sta->data[sta->top]); 604 sta->top--; 605 sprintf(sta->data[sta->top], "%.8lf", result); 606 i++; 607 continue; 608 } 609 else 610 { 611 sta->top++; 612 strcpy_s(sta->data[sta->top], suffix[i]); 613 i++; 614 continue; 615 } 616 } 617 618 setcolor(DARKGRAY); 619 settextstyle(60, 20, _T("宋体")); 620 if (sta->top == 0) 621 outtextxy(480 - strlen(sta->data[sta->top]) * 20, 20, _T(sta->data[sta->top])); 622 else if (sta->top != 0) 623 outtextxy(190, 20, _T("ERROR")); 624 } 625 626 //画图菜单界面 627 void image_menu() 628 { 629 int serial_number, select, marker = 0; 630 printf("1.一次函数\n"); 631 printf("2.二次函数\n"); 632 printf("3.三角函数\n"); 633 printf("4.幂函数\n"); 634 printf("5.指数函数\n"); 635 printf("6.对数函数\n"); 636 printf("7.圆锥曲线\n"); 637 printf("8.阿基米德螺线\n"); 638 printf("9.心形线\n"); 639 printf("10.玫瑰曲线\n"); 640 printf("0.退出\n"); 641 do 642 { 643 fflush(stdin); 644 printf("Please input serial number:"); 645 scanf_s("%d", &serial_number); 646 647 648 } while (serial_number < 0 && serial_number>10); 649 650 switch (serial_number) 651 { 652 case 0: 653 break; 654 case 1: 655 function1(); 656 marker = 1; 657 break; 658 case 2: 659 function2(); 660 marker = 1; 661 break; 662 case 3: 663 function3(); 664 marker = 1; 665 break; 666 667 case 4: 668 function4(); 669 marker = 1; 670 break; 671 case 5: 672 function5(); 673 marker = 1; 674 break; 675 case 6: 676 function6(); 677 marker = 1; 678 break; 679 case 7: 680 function7(); 681 marker = 1; 682 break; 683 case 8: 684 function8(); 685 marker = 1; 686 break; 687 case 9: 688 function9(); 689 marker = 1; 690 break; 691 case 10: 692 function10(); 693 marker = 1; 694 break; 695 } 696 697 if (marker == 1) 698 { 699 printf("是否继续画图？\n1.是 0.否"); 700 scanf_s("%d", &select); 701 if (select == 1) 702 { 703 marker = 0; 704 image_menu(); 705 } 706 } 707 } 708 709 //创建坐标系 710 void creatCoordinate() 711 { 712 //setbkcolor(WHITE); 713 initgraph(600, 600); 714 setorigin(300, 300); 715 716 setlinecolor(RED); 717 line(-300, 0, 300, 0); 718 line(0, -300, 0, 300); 719 settextcolor(RED); 720 settextstyle(30, 20, _T("宋体")); 721 outtextxy(280, 5, _T("x")); 722 outtextxy(5, -300, _T("y")); 723 setaspectratio(1, -1); 724 } 725 726 //function1~10是十个画图函数 727 void function1() 728 { 729 float k, b, x, y; 730 printf("Please input k and b(y=k*x+b) :"); 731 scanf_s("%f%f", &k, &b); 732 fflush(stdin); 733 734 float sin = k / sqrt(k*k + 1); 735 float cos = 1 / sqrt(k*k + 1); 736 737 creatCoordinate(); 738 739 for (double t = -300; t < 300; t = t + 0.001) 740 { 741 x = (int)(t * cos); 742 y = (int)(t * sin + b); 743 putpixel(x, y, RED); 744 } 745 getchar(); 746 getchar(); 747 closegraph(); 748 749 } 750 751 void function2() 752 { 753 double x0, y0, a0; 754 int x, y, k = 10; //k为放大比例 755 printf("请输入定点坐标X0,Y0:"); 756 scanf_s("%lf%lf", &x0, &y0); 757 printf("\n请输入二次项系数："); 758 scanf_s("%lf", &a0); 759 fflush(stdin); 760 761 creatCoordinate(); 762 for (double t = -300; t < 300; t = t + 0.001) 763 { 764 x = (int)(k*x0 + k * t); 765 y = (int)(y0 + a0 * t*t); 766 putpixel(x, y, RED); 767 } 768 getchar(); 769 getchar(); 770 closegraph(); 771 } 772 773 774 void function3() 775 { 776 double a, b, m, n; 777 int x, y, k = 10; 778 printf("绘制三角函数图像(y=asin(mx)+bcos(nx))"); 779 printf("请输入a,b,m,n"); 780 scanf_s("%lf%lf%lf%lf", &a, &b, &m, &n); 781 fflush(stdin); 782 creatCoordinate(); 783 784 for (double i = -10 * PI; i < 10 * PI; i = i + 0.001) 785 { 786 y = (int)(k*a*sin(m*i) + k * b * cos(n*i)); 787 x = (int)k*i; 788 putpixel(x, y, RED); 789 } 790 791 getchar(); 792 getchar(); 793 closegraph(); 794 } 795 796 void function4() 797 { 798 double a; 799 int x, y, k = 10; 800 printf("绘制幂函数图像(y=Xa"); 801 printf("请输入a"); 802 scanf_s("%lf", &a); 803 creatCoordinate(); 804 805 for (double i = -300; i < 300; i = i + 0.001) 806 { 807 x = (int)(k*i); 808 y = (int)pow(i, a); 809 putpixel(x, y, RED); 810 } 811 812 getchar(); 813 getchar(); 814 closegraph(); 815 } 816 817 void function5() 818 { 819 double a; 820 int x, y, k = 10; 821 printf("绘制指数函数图像(y=aX(a>0且a!=1)"); 822 printf("请输入a"); 823 scanf_s("%lf", &a); 824 fflush(stdin); 825 creatCoordinate(); 826 827 for (double i = -300; i < 300; i = i + 0.001) 828 { 829 x = (int)(k*i); 830 y = (int)(pow(a, i)); 831 putpixel(x, y, RED); 832 } 833 834 getchar(); 835 getchar(); 836 closegraph(); 837 } 838 839 void function6() 840 { 841 double a, b, c, d; 842 int x, y; 843 printf("绘制对数函数图像(y=alogb(c+dx)"); 844 printf("请输入a,b,c,d(b>0)"); 845 scanf_s("%lf%lf%lf%lf", &a, &b, &c, &d); 846 fflush(stdin); 847 creatCoordinate(); 848 849 for (double i = -c / d + 0.1; i < 300; i = i + 0.001) 850 { 851 x = (int)i; 852 y = (int)(a * log(c + d * i) / log(b)); 853 putpixel(x, y, RED); 854 } 855 856 getchar(); 857 getchar(); 858 closegraph(); 859 } 860 void function7() 861 { 862 863 int x, y; 864 double e, p; //e为离心率，p为焦准距 865 printf("请输入离心率e,焦准距p"); 866 scanf_s("%lf%lf", &e, &p); 867 fflush(stdin); 868 double k = 50; //调节图形大小 869 870 creatCoordinate(); 871 for (double i = 0; i < 2 * PI; i += 2 * PI / 3600) 872 { 873 x = k * e*p / (1 - e * cos(i))*cos(i); 874 y = k * e*p / (1 - e * cos(i))*sin(i); 875 putpixel(x, y, RED); 876 } 877 878 getchar(); 879 getchar(); 880 closegraph(); 881 } 882 883 void function8() 884 { 885 creatCoordinate(); 886 887 int x, y, k = 10; 888 int a = 1, b = 5; 889 for (double i = 0; i < 6 * PI; i = i + 2 * PI / 360) 890 { 891 x = (int)k*(a + b * i)*cos(i); 892 y = -(int)k*(a + b * i)*sin(i); 893 putpixel(x, y, RED); 894 } 895 getchar(); 896 getchar(); 897 closegraph(); 898 } 899 void function9() 900 { 901 creatCoordinate(); 902 903 int x, y; 904 double a = 100; 905 for (double i = 0; i < 2 * PI; i = i + 2 * PI / 720) 906 { 907 x = (int)a * (1 + sin(i))*cos(i); 908 y = -(int)a * (1 + sin(i))*sin(i); 909 putpixel(x, y, RED); 910 } 911 getchar(); 912 getchar(); 913 closegraph(); 914 } 915 916 void function10() 917 { 918 creatCoordinate(); 919 int x, y, a = 200, k = 4; 920 921 for (double i = 0; i < 4 * PI; i = i + 2 * PI / 3600) 922 { 923 x = (int)a * sin(PI* i)*cos(i); 924 y = (int)a * sin(PI* i)*sin(i); 925 926 putpixel(x, y, RED); 927 } 928 getchar(); 929 getchar(); 930 closegraph(); 931 }
注意ide
本人使用的是VS2017，上面的代码直接粘贴过去大几率跑不起来，须要作一点修改：函数
一、若提示graphics.h不存在，须要先安装EasyX图形库post
二、报错“Lsta、Lstr: 为声明的标识符”,须要在项目属性中将字符集从Unicode改为多字节字符集spa
三、sprintf等报错，须要在项目属性中关掉SDL检查code