C++实验二

实验二 预处理和语句

【实验目的】

1、熟悉并掌握使用文件包含命令；

2、熟悉并学习使用条件编译命令；

3、掌握选择语句；

4、掌握循环语句；

【实验内容】

1、编写一个程序，输入某雇员的每周工作时间（以小时计）和每小时的工资数，计算并输出他的工资。若雇员周工作小时超过40 小时，则超过部分按原工资的1.5 倍的加班工资来计算。若雇员每周工作小时超过60 小时，则超过60 的部分按原工资的3 倍的加班工资来计算，而40 到50 小时的工资仍按照原工资的1.5 倍的加班工资来计算。

•要求有输入提示和输出提示，如要输入雇员的工作时间和每小时的工资值时，可以提示：

“Please input employee’s work time and wage_per_hour:”

输出时，提示：

“The employee’s wage :”；

2、编写一个程序，提示用户输入一个年份及这一年的第一天是星期几，输出每个月的第一天是星期几。例如，如果用户输入2005和6，表示 2005年1月1日是星期六，程序应输出如下内容：

January 1, 2005 is Saturday

…

December 1, 2005 is Thursday

•用函数 int ComputeDay(int year, int day)计算星期；

•在main函数完成用户输入和输出工作；

3、编写贷款分期偿还程序。一笔贷款的月还款包含偿还本金和偿还利息。月利息可以通过月利率乘以余额(剩余本金)来计算，于是月偿还金额就等于月还款额减去月利息。

•要求用户输入贷款额、贷款年限和利率，程序输出分期还款的计划。

•如果输入贷款额度10000美元、期限1年和利率7%，程序应该输出：

Load Amount：10000

Number of Years：1

Annual Interest Rate：7%

 

Monthly Payment：865.26

Total Payment：10381.21

 

Payment# Interest Principal Balance

1 58.33 806.93 9193.07

2 53.62 811.64 8381.43

…

11 10.0 855.26 860.27

12 5.01 860.25 0.01

 

#include<iostream>  
using namespace std;
int main(){
    double hour,pwage,wage;
    cout<<"Please input employee’s work time and wage_per_hour:";  
    cin>>hour>>pwage;
    if(hour<=40) wage=hour*pwage;
    if(hour>40&&hour<=60) wage=40*pwage+(hour-40)*1.5*pwage;
    else wage=(hour-60)*pwage*3+20*pwage*1.5+40*pwage;
    cout<<"The employee’s wage :"<<wage<<endl; 
    return 0;
}

#include<iostream>
using namespace std;
int i=0;
int ComputeDay(int year, int day){
   int monthday[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
   i++;
   if(year%4==0&&year%100!=0||year%400==0)
     monthday[1]=29;
   day=(day+monthday[i]-28)%7;
   if(day==0) day=7;
   return day;
}
int main()
{
    int i,year,day;
char month[12][10]={"January","February","March","April","May","June","July","August","September","October","November","December"};
 char dayone[7][10]={"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"};
 cout<<"Please input the year and the day:";
 cin>>year>>day;
 cout<<"January"<<" 1,"<<year<<" is "<<dayone[day-1]<<endl;
 for(i=1;i<=11;i++){
    day=ComputeDay(year,day);
    cout<<month[i]<<" 1,"<<year<<" is "<<dayone[day-1]<<endl;
 }
 return 0;
}

#include<iostream>
#include<math.h>
#include<iomanip>
using namespace std;
int main(){
    double la,noy,air;
    double interest,balance;
    int month;
    cout<<"Load Amount：";
    cin>>la;
    cout<<"Number of Years：";
    cin>>noy;
    cout<<"Annual Interest Rate：";
    cin>>air;
    double monthlyPayment=la*air/12*pow(1+air/12,12*noy)/(pow(1+air/12,12*noy)-1);
    double totalPayment=monthlyPayment*noy*12;
    cout<<endl;
    cout<<"Monthly Payment："<<fixed<<setprecision(2)<<monthlyPayment<<endl;
    cout<<"totalPayment: "<<fixed<<setprecision(2)<<totalPayment<<endl;
    cout<<endl;
    cout<<"Payment#      Interest     Principal      Balance"<<endl; 
    balance=la;
    for(month=1;month<=noy*12;month++){  
        interest=balance*air/12; 
        balance-=(monthlyPayment-interest);  
        cout<<month<<"              "<<interest<<"      "<<monthlyPayment-interest<<"       "<<balance<<endl;  
    }  

    return 0;
}