C语言学习3

实现输入错误后重新输入

通过输入指定的行数和列数打印出二维数组对应的任一行任一列的值：

 1 #include <stdio.h>
 2 
 3 void main()
 4 {
 5     int a[3][4] = {{1, 2, 3, 4},{5, 6, 7, 8},{9, 10, 11, 12}};
 6     int i, j;
 7     int (*p)[4];
 8     printf("i = ");
 9     scanf("%d", &i);
10     while(i>2 || i<0)
11     {
12         printf("i = ");
13         scanf("%d", &i);
14     }
15     printf("j = ");
16     scanf("%d", &j);
17     while(j>3 || i<0)
18     {
19         printf("j = ");
20         scanf("%d", &j);
21     }
22     p = a;
23     printf("a[%d][%d] = %d\n", i, j, *(*(p+i)+j));
24 }