习题6.13

#include <stdio.h>#include <stdlib.h>int main(){    int i,a,sum=0;    printf("请输入一些整数：");    scanf("%d",&i);    while(i!=0){ scanf("%d",&i);      if(i>0)      {          sum+=i;        }      else if(i<0) continue;     }     printf("%d",sum);    return 0;}