Question

C语言问题

1. 已知从银行贷款的月利率：一年期为0.9%，两年期为1%，三年期为1.11%，三年以上为1.2%。从键盘输入贷款金额和期限，计算到期后应归还银行的本金和利息合计为多少？

Answer 1

本金加利息=本金*（1+月利率）^月数

在c里有一个乘方函数pow()

pow(a,b)  等于 a的b次方

#include <stdio.h>

#include<math.h>

main()

{

 double money,capital;

 double rate[4]={0.009,0.01,0.0111,0.012};

 int n;

 printf("请输入本金和期限(年)\n");

 scanf("%lf%d",&capital,&n);

 if(n>3)

  money=capital*pow((1+rate[3]),12*n);

 else

  money=capital*pow((1+rate[n-1]),12*n);

 printf("%d年后本金和利息合计为：%.2lf\n",n,money); 

}

Answer 2

#include<stdio.h>int main(void)
{
int x,y;
printf("\nPlease input money,month:");
scanf("%d %d",&x,&y);
switch(y)
{
case 1:
printf("\n %0.2fyuan",x + x*y*0.009);
break;
case 2:
printf("\n %0.2fyuan",x + x*y*0.01);
break;
case 3:
printf("\n %0.2fyuan",x + x*y*0.011);
break;
default :
printf("\n %0.2fyuan",x + x*y*0.012);
}
return 0;
}