为什么这个while嵌套循环他只会运行一次，而不能达到嵌套的目的呢

Question

int main()
{
    int a = 0, b = 0, c = 0;
    while (a < 15)
    {
        while (b < 23)
        {
            c = 45 - a - b;
            if (a * 3 + b * 2 + 0.5 * c == 45)
                printf("men=%d,women=%d,child=%d\n", a, b, c);
            b++;
        }
        a++;
    }
        return 0;
        }

Answer 1

int main()
{
    int a = 0, b = 0, c = 0;
    while (a < 15)
    {b=0; //每次循环b都要从头开始
        while (b < 23)
        {
            c = 45 - a - b;
            if (a * 6 + b * 4 + c == 90) //浮点数有误差，扩大两倍，用整数计算
                printf("men=%d,women=%d,child=%d\n", a, b, c);
            b++;
        }
        a++;
    }
        return 0;
        }

问题解决的话，请点下采纳