累加#include <iostream>#include<cmath>using namespace std;int main(){ double a,b,c,d=0,e=0,f=0;//数据要初始化 cin >> a>>b>>c; for (int i = 1; i <= a; i++) { d += i; } for (int o = 1; o <= b; o++) { e += o*o; } for (d...