编程:输入4个整数,求其方差,然后输出(输出要求精确到小数点后3位)答:以下是用C语言实现的代码:include <stdio.h> include <math.h> int main() { int a, b, c, d;float mean, variance;printf("请输入4个整数:\n");scanf("%d %d %d %d", &a, &b, &c, &d);mean = (float)(a + b + c + d) / 4;variance = ((a - mean) * (a - ...