3-1逆序输出

#include <stdio.h>
#include <string.h>
#define Max 100
int a[Max];
int b[Max];
int main(){
    int x,n = 0;
    int i; 
    while(scanf("%d",&x) == 1){  //检测是否正常输出(输出异常，则退出) 
        a[n++] = x;
    }
    //进行复制
    memcpy(b,a,sizeof(int)*3); 
    for(i = n-1; i >= 1; i--){
        printf("%d",b[i]);
    }
    printf("%d\n",a[0]);
    return 0;
}