题解 1015: [编程入门]求和训练

参考代码:

#include<iostream>

using namespace std;

int main()

{

int a = 0;

int b = 0;

int c = 0;

cin >> a >> b >> c;

int suma = 0;

int sumb = 0;

double sumc = 0;

for (int i = 1; i <= a; i++)

{

suma = suma + i;

}

for (int i = 1; i <= b; i++)

{

sumb = sumb + i*i;

}

for (int i = 1; i <= c; i++)

{

sumc = sumc + 1.0/i;

}

printf("%.2lf", suma + sumb + sumc);

system("pause");

return 0;

}