编辑代码

#include <stdio.h>
int main () 
{
    const int num=10;
    int x;
    int count[num];
    int i;

    for ( i=0; i<num; i+=1 ){
        count[i]=0;
    }
   
    scanf("%d",&x);
    while(x!= -1) {
        if ( x>=0 && x<num ){
            count[x]+=1;
        }
        scanf("%d",&x);
    }

    for ( i=0; i<num; i+=1 ){
        printf("%d 出现 %d 次\n", i, count[i] );
    }
    return 0;
}