数字逆序输出 并去除前导0

#include "stdio.h"
int main()
{
    int i, r;
    while(scanf("%d",&i)==1){
    int c=0;
    if(i == 0)
    printf("%d", i);
    while(i != 0)
    {
        r = i % 10;
        if(r==0){
            if(c!=0){
            printf("%d",r);
            c++;
            }
        }else{
            printf("%d",r);
            c++;
        }
        i /= 10;
    }
    printf("\n");
}
return 0;
}