原来这就是命令行下的“学生信息管理系统”

由于不是计算机专业，一直对没被要求写过坑爹的“XXX管理系统”深表遗憾。

好吧。

机会来了。

选修课上写的，野蛮暴力。

小朋友请在家人指导下观看。

  1 #include <stdio.h>
  2 #include <string.h>
  3 #include <stdlib.h>
  4 #include <conio.h>
  5 
  6 /********函数声明******/
  7 
  8 void AddStudent();  
  9 void Search_By_name();
 10 void Search_By_class();
 11 void Search_By_Age();
 12 void Search_By_class_And_age();
 13 void Print_By_Index(int i);
 14 void PrintHelloWord();
 15 void clean();
 16 void Start();
 17 
 18 /********************/
 19 struct Student
 20     {
 21         char name[30];
 22         char phone[20];
 23         char address[100];
 24         int  class_num;
 25         int  age;
 26     };
 27 #define MaxSize 100
 28 Student students[MaxSize];
 29 int current_size = 0;
 30 int main()
 31 {
 32     
 33     
 34     
 35     
 36     Start();              //程序启动
 37     return 0;
 38 
 39 }
 40 void Search_By_name()   // 返回该姓名对应索引
 41 {
 42   int i = 0;
 43   int count = 0;
 44   char name[100];
 45   printf("请输入姓名");
 46   scanf("%s",name);
 47   if(name)
 48   {
 49       for(i = 0;i < current_size;i++)
 50       {
 51           if(strcmp(students[i].name,name) == 0 )
 52           {
 53               Print_By_Index(i);
 54               count ++;
 55           }
 56       }
 57       printf("总共有%d个学生",count);
 58       getch();
 59   }
 60 
 61 }
 62 void Search_By_class()      //  
 63 {
 64     int num = -1;
 65     int count = 0;
 66     printf("请输入班级号:");
 67     scanf("%d",&num);
 68     if(num >= 1)
 69     {
 70         int i = 0;
 71         for(i = 0;i < current_size;i++)
 72         {
 73             if(students[i].class_num == num)
 74             {
 75                 Print_By_Index(i);
 76                 count ++;
 77             }
 78         }
 79         printf("总共有%d位同窗",count);
 80         getch();
 81 
 82     }
 83     else
 84         printf("输入有误");
 85 
 86 }
 87 void Print_By_Index(int i)     //打应索引为i的学生信息
 88 {
 89     printf("姓名 = %s\n",students[i].name);
 90     printf("电话 = %s\n",students[i].phone);
 91     printf("地址 = %s\n",students[i].address);
 92     printf("班级 = %d\n",students[i].class_num);
 93     printf("年龄 = %d\n",students[i].age);
 94 }
 95 void Search_By_class_And_age()      //  
 96 {
 97     int class_num = -1;
 98     int  age_min = -1;
 99     int  age_max = -1;
100     printf("输入要查询的班级");
101     scanf("%d",&class_num);
102     printf("输入年龄下限");
103     scanf("%d",&age_min);
104     printf("输入年龄上限");
105     scanf("%d",&age_max);
106     if((class_num > 0) && (age_max > age_min) && (age_max > 0) && (age_min > 0))
107     {
108         int i = 0;
109         int count = 0;
110         for(i = 0;i < current_size;i++)
111         {
112             if(students[i].class_num == class_num && (students[i].age >= age_min && students[i].age <= age_max) )
113                 {
114                     Print_By_Index(i);
115                     count ++;
116                 }
117         }
118         printf("总共有%d个学生",count);
119         getch();
120     }
121 }
122 
123 void clean()//清屏
124 {
125     system("cls");
126 }
127 void PrintHelloWord()   // 打印界面
128 {
129     int i = 0;
130     for(;i < 80;i++)
131         printf("*");
132     printf("\n");
133 
134     int line = 7;
135     for(i = 0;i < line;i++)
136     {
137         int j = 0;
138         
139         switch(i)
140         {
141 
142             case 0:
143                 printf("\t\t\t%10s\n\n","本系统功能以下");
144                 break;
145             case 1:
146                 printf("\t%10s\n","[a] 添加学生信息");
147                 break;
148             case 2:
149                 printf("\t%10s\n","[b] 经过姓名查信息");
150                 break;
151             case 3:
152                 printf("\t%10s\n","[c] 找出班级人数及名单");
153                 break;
154             case 4:
155                 printf("\t%10s\n","[d] 找出某年龄段人数及名单");
156                 break;
157             case 5:
158                 printf("\t%10s\n","[e] 经过班级和年龄查找学生");
159                 break;
160             case 6:
161                 printf("\t%10s\n","[f] 退出                  ");
162                 break;
163         }
164         
165     }
166     for(;i < 87;i++)
167         printf("*");
168     printf("\n\n");
169     printf("请输入您的选择：");
170 
171 
172 
173 }
174 void AddStudent()       //添加学生
175 {
176     if(current_size >= MaxSize - 1)
177     {
178         printf("名额已满");
179         getch();
180     }
181     else
182     {
183         printf("请输入学生姓名：");
184         scanf("%s",students[current_size].name);
185         printf("请输入电话号码：");
186         scanf("%s",students[current_size].phone);
187         printf("请输入地址：");
188         scanf("%s",students[current_size].address);
189         printf("请输入班级：");
190         scanf("%d",&students[current_size].class_num);
191         printf("请输入年龄：");
192         scanf("%d",&students[current_size].age);
193         current_size++;
194     }
195     printf("添加成功\n");
196     getch();
197 
198 }
199 void Start()
200 {
201 
202     
203     char c = 0;
204     while(c != '#')
205     {
206         PrintHelloWord();
207         scanf("%c",&c);
208         switch(c)
209         {
210             // 添加学生信息
211             case 'a':
212                 AddStudent();
213                 break;
214             // 经过姓名查信息
215             case 'b':
216                 Search_By_name();
217                 break;
218             //找出班级人数及名单
219             case 'c':
220                 Search_By_class();
221                 break;
222             //找出某年龄段人数及名单
223             case 'd':
224                 Search_By_Age();
225                 break;
226             //经过班级和年龄查找学生
227             case 'e':
228                 Search_By_class_And_age();
229                 break;
230             case 'f':
231                 c = '#';
232                 break;
233             default:
234                      printf("您的输入有误\n");
235                      break;
236         }
237         //printf("按任意键继续");
238         //getch();
239         clean();
240     }
241 
242 }
243 void Search_By_Age()
244 {
245     
246     int  age = -1;
247 
248     printf("输入年龄");
249     scanf("%d",&age);
250     if(age > 0)
251     {
252         int i = 0;
253         int count = 0;
254         for(i = 0;i < current_size;i++)
255         {
256             if(students[i].age == age)
257             {
258                     Print_By_Index(i);
259                     count ++;
260             }
261         }
262         printf("总共有%d个学生",count);
263         getch();
264     }
265 }

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