Problem C: 零起点学算法82——数组中查找数

#include <stdio.h>

int main(int argc, char *argv[])

{

    int n,b,i,m,flag=0,a[20];

    while(scanf("%d",&n)!=EOF){

        for(i=0;i<n;i++){

            scanf("%d",&a[i]);

        }

        scanf("%d",&m);

        for(i=0;i<n;i++){

        if(a[i]==m){

            b=i;

            flag=1;

            break;

         }

        }

        if(flag==1){

        printf("%d\n",b);

        }

        else{

        printf("No\n");

        }

        flag=0;

    }

    return 0;

}