简易房贷月供计算器

下面是用C语言编写的简易房贷月供计算器，供参考。

#include "stdio.h" 
#include "math.h"
int main()
{
	double amountOfLoan,annualInterest,repaymentPeriod; //input
	double monthlyPayments;  //output
	double monthlyInterest,numOfMonth,tmp; // intermediate variables
	//Input
	printf("\n A simple loan calculator\n\n");
	printf(" Please input amount of loan(￥):");
	scanf("%lf",&amountOfLoan);
	printf("\n Please input annual interest(%%):");
	scanf("%lf",&annualInterest);
	printf("\n Please input repayment period(years):");
	scanf("%lf",&repaymentPeriod);
	//calculate 
	monthlyInterest = annualInterest/100/12;
	numOfMonth = repaymentPeriod*12;
	tmp = pow(1+monthlyInterest,numOfMonth);
	monthlyPayments = (amountOfLoan * tmp * monthlyInterest)/(tmp-1); 
	//output
	printf("\n\n You need to repay ￥%.2f each month. Good luck!\n",monthlyPayments);
	return 0;
}

下面是用HTML、CSS和Javascript脚本语言写的一个简易贷款月供计算器，可以在浏览器中运行。HTML定义了网页元素，CSS定义了页面样式，Javascript实现了核心的计算部分。Javascript片段（标签之间的代码）的实现思路和上面写的C语言代码是相似的：先获取数据，然后借助数学库函数进行计算，最后输出结果。不同的是，这里从网页上的文本框获取数据，结果也是显示到页面元素上。

  
  
  
    
    	
      
  

    
	
    
  
        
  
            
JavaScript Loan Calculator
               
        
  
        
  
            
Amount of the loan(￥):
  
            
             
        
  
         
  
            
Annual interest(%):
  
            
             
        
  
         
  
            
Repayment period(years):
  
            
             
        
  
         
  
            
Approximate Payments:
  
            
Calculate
             
        
  
         
  
            
Monthly Payments:
  
            
￥
             
        
  
         
  
            
Total Payments:
  
            
￥
             
        
  
         
  
            
Total Interest:
  
            
￥
             
        
    
    
		
	
      
  

把上述代码复制到一个文本文档中，后缀名改为.html，双击即可在浏览器中运行。