C语言，while嵌套while循环，好像进入死循环了

Question

while((scanf("%d", &num)) == 1)
{
while( num != 0)
{
if(num % 2 == 0)
{
e_num += num;
i++;
}
else
{
o_num += num;
j++;
}
}

    printf("The numbers of odd number are:%d, average of odd numbers is:%f\n", j, (float)o_num / j);
    printf("The numbers of odd number are:%d, average of odd numbers is:%f\n", i, (float)e_num / i);
    printf("Please enter another numbers(0 to quit):\n");
}

请问我这段代码哪里出了问题吗？完整代码和运行结果如下图，麻烦帮忙指出问题所在

！

Answer 1

你这是双层死循环，内外皆死。内层循环死的更惨。while的条件是num不为0，但循环内并没有修改num值，那么只要输入一个不为0的num，这个循环就死循环了。
所以你整个双循环逻辑是不对的

#include <stdio.h>
int main()
{
    int e_num,o_num,i,j,num;
    while((scanf("%d", &num)) == 1)
    {
        e_num = 0;
        o_num = 0;
        i = j = 0;
        while( num != 0)
        {
            if(num % 2 == 0)
            {
                e_num += num;
                i++;
            }
            else
            {
                o_num += num;
                j++;
            }
            scanf("%d",&num);
        }
        printf("The numbers of odd number are:%d, average of odd numbers is:%f\n", j, (float)o_num / j);
        printf("The numbers of odd number are:%d, average of odd numbers is:%f\n", i, (float)e_num / i);
        printf("Please enter another numbers(0 to quit):\n");
    }
    return 0;
}