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#include<stdio.h>
#include<math.h>
int main()
{
float price,area,yir,mir; //单价,面积,年利润,月利润
float interest,loan; //利息,贷款总额
float ave_repay,down_payment; //月均还款,首期付款
float total_price,total_repay; //房贷总额,还款总额
float ratio,time; //按揭成数,按揭年数
printf("请输入单价(元/平方):");
scanf("%f",&price);
printf("请输入面积:");
scanf("%f",&area);
printf("请输入按揭成数:");
scanf("%d",&ratio);
printf("请输入按揭年数:");
scanf("%d",&time);
printf("请输入当前基准年利润:");
scanf("%f",&yir);
mir=yir/100/12; //年利润需要除以100得到,因为用户输入的是5.4(%),而不是0.054
time=time*12;
total_price=price*area;
loan=total_price*ratio/10; //这里不能写成(ratio/10),否则结果变为0
ave_repay=loan*mir*pow((1+mir),time)/(pow((1+mir),time)-1);
interest=ave_repay*time-loan;
total_repay=loan+interest;
down_payment=total_price*(1-(float)ratio/10); //制转换ratio为浮点型
printf("========== 报告结果 ==========\n");
printf("房款总额:%.2f元\n",total_price);
printf("首期付款:%.2f元\n",down_payment);
printf("贷款总额:%.2f元\n",loan);
printf("还款总额:%.2f元\n",total_repay);
printf("支付利息:%.2f元\n",interest);
printf("月均还款:%.2f元\n",ave_repay);
return 0;
}
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