这是个求1-100奇数之和的平均值的程序
# include <stdio.h>

int main(void)
{
    int i;
    float pj, sum1, sum;
    sum = 0;
    sum1 = 0;
    for (i=1; 1<=100; ++i)
    {
        if (i%2 != 0)
        {
            sum = sum + i;
            sum1 = sum1 + 1;
        }
    }
    pj = sum/sum1;

    printf("平均值为：%f\n", pj);

    return 0;
}