#include<stdio.h>
#include<stdlib.h>
int main()
{
    double sum1 = 0; int sum2 = 0; double sum3 = 0, sum;
    for (int i = 1; i<=100; i++)
    {
        sum1 = sum1 + i;
    }
    for (int j = 1; j<=20; j++)
    {
        sum2 = sum2 + j*j;

    }
    for (int k = 1; k<=200; k++)
    {
        sum3 = sum3 + 1 / k;
    }
    printf("sum=%10.6lf", sum = sum1 + (double)sum2 + sum3);
    system("pause");
    return 0;
}