求一个会c语言的救命

供参考：

#include<stdio.h>
#include<math.h>
int main()
{
    int n,y;
    printf("Input x:\n");
    scanf("%d",&n);
    n = fabs(n);
    y = (n%10)*100 + (n/10%10)*10 + n/100;
    printf("y=%d\n",y);

    return 0;
}