c++primer plus 第六版 第2章 编程练习之路

//c++ Primer Plus（习题2.2)

//input 以 long为单位的距离，将它转换成码.（1 long =220码）#include<iostream>const float Yard = 220;int main(){using namespace std;cout<< "Input distance by long:";float result;cin >> result;cout << result << "long change to Yard is " << result*Yard << endl;return 0;}

//c++ Primer Plus（习题2.3)//use function twice,input some sentence!#include<iostream>void printf1(...); //不带参数列表的要用...void printf2(...);using namespace std;int main(void){printf1();printf1();printf2();printf2();return 0;}void printf1(...){cout << "Three blind mice\n";}void printf2(...){cout << "See how they run\n";}//c++ Primer Plus（习题2.4)//Input ages,Output how many mouths!#include<iostream>const int Years = 12;int main(void){using namespace std;cout << "Enter your age: ";int ages;cin >> ages;cout << "You live " << ages*Years << " months!\n"<<"Bye!";return 0;}//c++ Primer Plus（习题2.5)//Input Celsius dgree tranform to Fahrenheit#include<iostream>using namespace std;double Celsius_Fahrenheit(double degree);int main(void){cout << "Please enter a Celsious value: ";double value,result;cin >> value;result=Celsius_Fahrenheit(value);cout << value << " degree Celsius is " << result << " degrees Fahrenheit.\n";return 0;}double Celsius_Fahrenheit(double degree){return degree*1.8 + 32.0;}//c++ Primer Plus（习题2.6)//以光年值为参数，返回对应天文单位的值#include<iostream>using namespace std;double light_astronomical(double years);int main(void){cout << "Enter the number of light years: ";double lightyears, result;cin >> lightyears;result =light_astronomical(lightyears);cout << lightyears << " light years= " << result << " astronomical units.\n";return 0;}double light_astronomical(double years){return years*63240; //1光年=63240天文单位}//c++ Primer Plus（习题2.7)//Input hours and minutes,follow text;#include<iostream>using namespace std;void hours_minutes(int hours,int minutes);int main(void){cout << "Enter the number of hours: ";int Hours, Minutes;cin >> Hours;cout << "Enter the number of minute: ";cin >> Minutes;hours_minutes(Hours,Minutes);return 0;}void hours_minutes(int hours,int minutes){cout << "Time: " << hours << ":" << minutes<<endl;}

未完待续。。。。。。。。