编辑代码

#include <stdio.h>
int main () {
    int  a[10] = {0,23,56,6,87,24,16,19,21,29};
    a[0]=24;
    int i = 9;
    while(a[i]!=24)
    {i--;}
    printf("24的下标是%d\n",i);
return 0;
}