C++ Level 1 Practice BCQM3034: Floating Point Calculations for National Day

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CSP-XL
2025 Liaoning CSP-XL Re-examination Real Questions Analysis

This is a question that returns to the basic level of floating point calculations, reinforcing basic syntax practice.

BCQM3034: Floating Point Calculations for National Day

Problem Requirements

Description

Niuniu has recently studied an introductory C++ course, and the method for calculating the total score is: Total Score = Homework Score × 20% + Quiz Score × 30% + Final Exam Score × 50%Niuniu wants to know what score he can ultimately achieve in this course.

Input

There is only 1 line, containing three non-negative integers A, B, C, representing Niuniu’s homework score, quiz score, and final exam score, respectively. The numbers are separated by a space, and all three scores have a maximum of 100 points. 0 ≤ A, B, C ≤ 100 and A, B, C are all multiples of 10.

Output

There is only 1 line, containing an integer, which is Niuniu’s total score for this course, with a maximum of 100 points.

Input Example

100 100 80

Output Example

90

Problem Analysis

This is a simple weighted calculation problem that can be solved using floating point multiplication.

Sample Code

#include <iostream>using namespace std;int main() {    // Declare four integer variables for homework score, quiz score, final score, and total score    int A, B, C, d = 0;        // Read the three score values    cin >> A >> B >> C;        // Calculate total score according to weights: homework 20% + quiz 30% + final 50%    // Note: Since A, B, C are all multiples of 10, there will be no precision issues    d = A * 0.2 + B * 0.3 + C * 0.5;        // Output the final total score    cout << d;        // Program ends normally and returns 0    return 0;}

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