题解 | #反向输出一个四位数#

#include <stdio.h>

int main() 
{
    int num;
    int s1,s2,s3,s4;
    scanf("%d",&num);
    s1 = num/1000;
    s2 = (num-s1*1000)/100;
    s3 = (num-s1*1000-s2*100)/10;
    s4 = num%10;
    printf("%d%d%d%d",s4,s3,s2,s1); 
    return 0;
}