Lesson 26: Classes and Structures

P5740 【Deep Foundation 7. Example 9】 The Most Outstanding Student

#include<iostream>
#include<cstring>
using namespace std;

// Define structure
struct student{
	string name;
	float chinese;
	float math;
	float english;
	float total;
};

int main(){
	int n;
	cin >> n;
	student stus[1001];
	// Record the index of the student with the highest total score
	int index = -1;
	float mmax = -1;
	for(int i = 0; i < n; i++){
		// Save each student's information into the array
		student s = {};
		cin >> s.name >> s.chinese >> s.math >> s.english;
		s.total = s.chinese + s.math + s.english;
		if(s.total > mmax){
			mmax = s.total;
			index = i;
		}
		stus[i] = s;
	}
	// Output the information of the student with the highest score
	cout << stus[index].name << " ";
	cout << stus[index].chinese << " ";
	cout << stus[index].math << " ";
	cout << stus[index].english << " ";
	return 0;
}

P5741 【Deep Foundation 7. Example 10】 Evenly Matched Opponents – Enhanced Version

#include<iostream>
#include<cstring>
#include<cmath>
using namespace std;

// Define structure
struct student{
	string name;
	int chinese;
	int math;
	int english;
	int total;
};

// Determine if they are evenly matched
int opponent(student a, student b){
	if(abs(a.chinese - b.chinese) > 5){
		return 0;
	}
	if(abs(a.math - b.math) > 5){
		return 0;
	}
	if(abs(a.english - b.english) > 5){
		return 0;
	}
	if(abs(a.total - b.total) > 10){
		return 0;
	}
	return 1;
}

int main(){
	int n;
	cin >> n;
	student stus[1001];
	for(int i = 0; i < n; i++){
		// Save each student's information into the array
		student s = {};
		cin >> s.name >> s.chinese >> s.math >> s.english;
		s.total = s.chinese + s.math + s.english;
		stus[i] = s;
	}
	// Compare each student with the students behind them
	for(int i = 0; i < n; i++){
		for(int j = i + 1; j < n; j++){
			if(opponent(stus[i], stus[j])){
				cout << stus[i].name << " " << stus[j].name << "\n";
			}
		}
	}
	return 0;
}

P5742 【Deep Foundation 7. Example 11】 Grading

#include<iostream>
#include<cstring>
#include<cmath>
using namespace std;

// Define structure
struct student{
	int id;
	int score;
	int develop;
	int compositeScore;
	int getTotal(){
		return score + develop;
	}
};

// Determine if the student is excellent
int excellent(student a){
	if (a.getTotal() > 140 && a.compositeScore >= 800){
		return 1;
	}
	return 0;
}

int main(){
	int n;
	cin >> n;
	for(int i = 0; i < n; i++){
		// Save each student's information into the array
		student s = {};
		cin >> s.id >> s.score >> s.develop;
		s.compositeScore = s.score * 7 + s.develop * 3;
		if(excellent(s)){
			cout << "Excellent\n";
		} else {
			cout << "Not excellent\n";
		}
	}
	return 0;
}

P5744 【Deep Foundation 7. Exercise 9】 Training

#include<iostream>
#include<cstring>
using namespace std;

struct student{
	string name;
	int age;
	int score;
};

// Training
student cultivate(student stu){
	// Increase age by 1 year
	stu.age += 1;
	// Increase score by 20%
	stu.score = stu.score + stu.score * 0.2;
	if (stu.score > 600){
		stu.score = 600;
	}
	return stu;
}

int main(){
	int n;
	cin >> n;
	for(int i = 0; i < n; i++){
		// Save each student's information into the array
		student s = {};
		cin >> s.name >> s.age >> s.score;
		// Training
		s = cultivate(s);
		// Output
		cout << s.name << " ";
		cout << s.age << " ";
		cout << s.score << "\n";
	}
	return 0;
}