问题 1015: C语言程序设计教程（第三版）课后习题6.5

import java.util.Scanner;

public class Prog1015 {

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

int n = scan.nextInt();

int b = scan.nextInt();

int c = scan.nextInt();

int s = 0;

int s1 = 0;

double s2 = 0;

double sum = 0;

for (int i = 1; i <= n; i++) {

s += i;

}

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

s1 += i * i;

}

for (double i = 1; i <= c; i++) {

s2 += 1.0 / i;

}

sum = s + s1 + s2;

String sum1 = String.format("%.2f", sum);

System.out.println(sum1);

}

}