题: 编写一个C++程序,它显示您的姓名和地址。
解:
#include <iostream>
int main() {
using namespace std;
cout << "Hi there, I'm Shujia Huang from Shenzhen, Guangdong, China" << endl;
return 0;
}
题: 编写一个C++程序,它要求用户输入一个以 long 为单位的距离, 然后将它转换为码(yard,一long 等于 220 码)。
解:
#include <iostream>
int main() {
using namespace std;
int distance=0, yard;
cout << "Please input a distance numebr in the unit of Long: ";
cin >> distance;
yard = distance * 220;
cout << "The distance tranform in yards is: " << yard << endl;
return 0;
}
题: 编写一个C++程序,它使用 3 个用户定义的函数(包括main()),并生成下面的输出:
Three blind mice
Three blind mice
See how they run
See how they run
其中一个函数要调用两次,该函数生成前两行;另一个函数也被调用两次,并生成其余的输出。
解:
#include <iostream>
using namespace std;
void blind_mice() {
cout << "Three blind mice." << endl;
return;
}
void how_they_run() {
cout << "See how they run" << endl;
return;
}
int main() {
blind_mice();
blind_mice();
how_they_run();
how_they_run();
return 0;
}
题: 编写一个程序,让用户输入其年龄,然后显示该年龄包含多少个月,如下所示:
Enter your age: 29
解:
#include <iostream>
int main() {
using namespace std;
int years, months;
cout << "Enter your age: ";
cin >> years;
months = years * 12;
cout << years << " years is " << months << " monthes." << endl;
return 0;
}
题: 编写一个程序,其中的main( )调用一个用户定义的函数(以摄氏温度值为参数,并返回相应的华氏温度值)。该程序按下面的格式要 求用户输入摄氏温度值,并显示结果:
Please enter a Celsius value: 20
20 degrees Celsius is 68 degrees Fahrenheit.
转换公式:华氏温度 = 1.8×摄氏温度 + 32.0
解:
#include <iostream>
double celsiu2fahrenit(double celsius) {
return 1.8 * celsius + 32.0;
}
int main() {
using namespace std;
double celsius;
cout << "Please enter a celsius value: ";
cin >> celsius;
cout << celsius << " degrees Celsius is "
<< celsiu2fahrenit(celsius) << " degrees Fahrenheit." << endl;
return 0;
}
题: 编写一个程序,其main( )调用一个用户定义的函数(以光年值为参数,并返回对应天文单位的值)。该程序按下面的格式要求用户输 入光年值,并显示结果:
Enter the number of light years: 4.2
4.2 light years = 265608 astromonical units.
天文单位是从地球到太阳的平均距离(约150000000公里或93000000英里),光年是光一年走的距离(约10万亿公里或6万亿英里)(除太阳外,最近的恒星大约离地球4.2光年)。请使用double类型,转换公式为:1光年=63240天文单位.
解:
#include <iostream>
double light_years2astromonical_unit(double light_years) {
return light_years * 63240;
}
int main() {
using namespace std;
double light_years;
cout << "nter the number of light years: ";
cin >> light_years;
cout << light_years
<< " light years = "
<< light_years2astromonical_unit(light_years)
<< " astromonical units." << endl;
return 0;
}
题: 编写一个程序,要求用户输入小时数和分钟数。在 main() 函数中,将这两个值传递给一个void函数,后者以下面这样的格式显示这两个值:
Enter the number of hours: 9
Enter the number of minutes: 28
Time: 9:28
解:
#include <iostream>
using namespace std;
void display_time(double hours, double minutes) {
cout << "Time: " << hours << ":" << minutes << endl;
return;
}
int main() {
double hours, minutes;
cout << "Enter the number of hours: ";
cin >> hours;
cout << "Enter the number of minutes: ";
cin >> minutes;
display_time(hours, minutes);
return 0;
}