初学C语言【1】九九乘法口诀表

`在这里插入代码片`#include<stdio.h>
#include<stdlib.h>
#include<windows.h>
int main()
{
 system("color 73");
 int a, b, c, d;
 d = 0;
 a = 0;
 while (a < 9)
 {
  b = 1;
  a = a + 1;
  while (b <= a)
  {
   printf("%d*%d=%-2d   ", b, a, d = a * b);
   b = b + 1;
  }
  Sleep (1000);
  printf("          \n");
 }
}
                                           【while】                     

#include<stdio.h>
#include<stdlib.h>
int main()
{
 system("color 73");
 int i, j, k;
 k = 0;
 for (i = 1; i <= 9; i++)
 {
  for (j = 1; j <= i; j++)
   printf("%d*%d=%-2d    ", j, i, k = j * i);
  printf("   \n");
 }
}
                                                   【for】