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C++ Primer Plus 编程练习题第三章处理数据

news 来源：原创 2025/5/23 16:55:20

1.身高转换

#include <iostream>
using namespace std;

int main() 
{
	const int yingchi = 12;
	const double yingcun = 0.0254;
	double height;
	cout << "请输入你的身高（米）：____\b\b\b\b";
	cin >>height;
	cout << "您的升高为" << height / yingcun << "英寸";
	cout << "您的升高为" << height / yingcun / yingchi << "英尺";
	return 0;
}

2.BMI计算

#include <iostream>
using namespace std;

int main() 
{
	const int yingchi = 12;
	const double yingcun = 0.0254;
	const double bang = 2.2;

	double height_yingchi;
	double height_yingcun;
	cout << "请输入你的身高（英尺）：____\b\b\b\b";
	cin >> height_yingchi;
	cout << "请输入你的身高（英寸）：____\b\b\b\b";
	cin >> height_yingcun;
	double height_mi;
	height_mi = (height_yingchi * yingchi + height_yingcun) * yingcun;
	double weight_bang;
	cout << "请输入你的体重（磅）：____\b\b\b\b";
	cin >> weight_bang;
	double weight_kg;
	weight_kg = weight_bang / bang;
	double BMI;
	BMI = weight_bang / (height_mi * height_mi);
	cout << "您的BMI为" << BMI;
	return 0;
}

3.纬度转换

#include <iostream>
using namespace std;

int main() 
{
	const int degree_minute = 60;
	const int minute_second = 60;
	int degree;
	float minutes;
	float seconds;
	cout << "请输入度";
	cin >> degree;
	cout << "请输入分";
	cin >> minutes;
	cout << "请输入秒";
	cin >> seconds;
	cout << degree << "度" << minutes << "分" << seconds << "秒 = " << degree + minutes / degree_minute + seconds / (degree_minute * minute_second) << "度";
	return 0;
}

4.表示时间

#include <iostream>
using namespace std;

int main() 
{
	long seconds;
	cout << "输入秒数";
	cin >> seconds;
	const int day_seconds = 24*60*60;
	const int hour_seconds = 60*60;
	const int minute_seconds = 60;
	cout << seconds / day_seconds<<"days,"<< seconds % day_seconds/hour_seconds<<"hours,"<< seconds % hour_seconds /minute_seconds<<"minutes,"<< seconds % hour_seconds % minute_seconds;
	return 0;
}

5.人口计算

强制转换

#include <iostream>
using namespace std;

int main() 
{
	long long people_world;
	cout << "请输入全球人口";
	cin >> people_world;
	cout << "请输入全国人口";
	long long people_nation;
	cin >> people_nation;
	cout << "全国人口占全球人口百分比为" << (double(people_nation) / double(people_world))*100<<"%";
	return 0;
}

6.油耗计算

#include <iostream>
using namespace std;

int main() 
{
	double mile;
	cout << "请输入您的里程(英里)";
	cin >> mile;
	double gas;
	cout << "请输入您的耗油量（加仑）";
	cin >> gas;
	cout << "您耗油量为一加仑的里程为" << mile / gas<<"英里";
	return 0;
}

7.欧美耗油量转换

#include <iostream>
using namespace std;

int main() 
{
	const float mile_convert = 62.14;
	const float gas_convert = 3.875;
	float gas_mile;
	cout << "请输入欧洲风格的耗油量（升/百公里）";
	cin >> gas_mile;
	cout << "美国风格的耗油量为" << mile_convert/(gas_mile / gas_convert)<< "（gpm）";
	return 0;
}