double sum = 0;
    int tmp = 0;
    int i = 0;
    while ( 1 )
    {
        printf("please input a number： ");
        scanf("%d",&tmp);
        if ( tmp ==0 )
            break;
        else if (tmp<0)
        {
            printf("only positive numbers are accepted\n");
        }
        continue;
        sum += tmp;
        i++;
    }


    printf("the average is %0.2lf",sum/i );

    return 0;
}
请问大大，哪里有问题
输入2 2 -1 0
结果很奇怪。。the average is -1.#J