题解 | #提取不重复的整数#

#include <stdio.h>
#include <string.h>

int main()
{

    int a;
    int b;
    int arr[10];
    memset(arr,-1,10*sizeof(int));
    scanf("%d",&a);
    int new_num=0;

    while(a>0)
    {
        b= a%10;
        if(arr[b]==1){
            a /=10;
            continue;
        }
        else{
            arr[b] = 1;
            new_num = new_num*10+b;
        }     
        a /=10;
    }
    printf("%d",new_num);
    return 0;
}