记录——《C Primer Plus （第五版）》第七章编程练习第三题

   编写一个程序。该程序读取整数，直到输入0.输入终止后，程序应该报告输入的偶数（不包括0）总个数、偶数的平均数，输入的奇数总个数以及奇数的平均数。

# include <stdio.h>int main(void){    int even = 0, odd = 0, integer = 0;    double sum_even = 0, sum_odd = 0;    double mean_even, mean_odd;    while(scanf("%d", &integer) == 1 && integer != 0)    {        if(0 == integer%2)        {            even++;            sum_even += integer;        }        else if (1 == integer%2)        {            odd++;            sum_odd += integer;        }    }    if(0 == even)        mean_even = 0;    else        mean_even = sum_even/even;    if(0 == odd)        mean_odd = 0;    else        mean_odd = sum_odd/odd;    printf("偶数平均值：%.2lf, 偶数个数：%d,奇数平均值：%.2lf, 奇数个数：%d\n", mean_even, even, mean_odd, odd);    return 0;}