题解 | #数字颠倒#

#include <stdio.h>
struct Stack{
    char items[10];
    char top;
} ;
int main() {
    struct Stack stack;
    stack.top=-1;
    char c;
    while((c=getchar())!='\n')
    {
        stack.items[++stack.top]=c;
    }
    while(stack.top>=0)
    {
        printf("%c",stack.items[stack.top--]);
    }
    return 0;
}