复利计算5.0

#include<stdio.h>

#include<math.h>

void List();

void A();

void B();

void C();

void D();

void E();

void F();

void G();

void H();

void I(int op,double record[4]);

main()

{

int sel;

while(1)

{

List();

printf("\t请选择:");

while(scanf("%d",&sel)!=1||sel<0||sel>8)//防止输入的是字符以及输入的数字不是整数0-8

{

printf("\t输入错误!!!\n\n\t请重新选择:");

while(getchar() != '\n');        //  处理回车键

}

if(sel==0)

{

printf("\t欢迎下次再使用，谢谢!\n");

break;

}

switch(sel){//选择1~8的功能

case 1:

A();

break;

case 2:

B();

break;

case 3:

C();

break;

case 4:

D();

break;

case 5:

E();

break;

case 6:

F();

break;

case 7:

G();

break;

case 8:

H();

break;

}

}

}

void List()//目录表

{

printf("\t|--------------------------------------|\n");

printf("\t|               功能                   |\n");

printf("\t|--------------------------------------|\n");

printf("\t|                                      |\n");

printf("\t|           1.复利(一次支付)           |\n");

printf("\t|           2.复利(多次等额支付)       |\n");

printf("\t|           3.单利                     |\n");

printf("\t|           4.投入资金                 |\n");

printf("\t|           5.投入时间                 |\n");

printf("\t|           6.利率                     |\n");

printf("\t|           7.每月等额本息还款         |\n");

printf("\t|           8.投资计算                |\n");

printf("\t|           0.退出                     |\n");

printf("\t|                                      |\n");

printf("\t|--------------------------------------|\n");

}

void A()//一次投入复利计算

{

int n;//时间n

double p,i,sum1;//总金额p,利率i,本利和sum1

printf("\n\t*请输入存款金额:");

while(scanf("%lf",&p)!=1||p<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入存款金额:");

getchar();

}

printf("\t*请输入利率:");

while(scanf("%lf",&i)!=1||i<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入利率:");

getchar();

}

printf("\t*请输入存储时间(年):");

while(scanf("%d",&n)!=1||n<=0||n>100)

{

printf("\t输入错误!!!\n\n\t*请重新输入存储时间(年):");

getchar();

} ;

sum1=p*pow((1+i),n);//复利的计算公式

printf("\t**本利和为:%.2lf\n\n",sum1);//输出复利计算的结果

}

void B()//多次等额支付复利计算

{

int n;

double p,i,sum2=0;

char choose;

printf("\n\t多次等额投入方式:\n\t1.等额多次月投\n\t2.等额多次年投\n\t*请选择:");

while(scanf("%d",&choose)!=1||choose<1||choose>2)

{

printf("\t输入错误!!!\n\n\t请重新选择:");

while(getchar() != '\n');

}

while(getchar() != '\n');

if(choose==1)

{

printf("\n\t*请输入月投金额:");

while(scanf("%lf",&p)!=1||p<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入月投金额:");

getchar();

}

printf("\t*请输入年利率:");

while(scanf("%lf",&i)!=1||i<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入利率:");

getchar();

}

printf("\t*请输入存储时间(年):");

while(scanf("%d",&n)!=1||n<=0||n>100)

{

printf("\t输入错误!!!\n\n\t*请重新输入存储时间(年):");

getchar();

}

sum2=p*12*(pow(1+i,n)-1)/i;

printf("\t**本利和为:%.2lf\n\n",sum2);

}

else

{

printf("\n\t*请输入年投金额:");

while(scanf("%lf",&p)!=1||p<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入年投金额:");

getchar();

}

printf("\t*请输入年利率:");

while(scanf("%lf",&i)!=1||i<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入利率:");

getchar();

}

printf("\t*请输入存储时间(年):");

while(scanf("%d",&n)!=1||n<=0||n>100)

{

printf("\t输入错误!!!\n\n\t*请重新输入存储时间(年):");

getchar();

}

sum2=(p*pow((1+i),n)-1)/i;

printf("\t**本利和为:%.2lf\n\n",sum2);

}

}

void C()//单利计算

{

int n;

double p,i,sum3;

printf("\n\t*请输入存款金额:");

while(scanf("%lf",&p)!=1||p<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入存款金额:");

getchar();

}

printf("\t*请输入年利率:");

while(scanf("%lf",&i)!=1||i<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入利率:");

getchar();

}

printf("\t*请输入存储时间(年):");

while(scanf("%d",&n)!=1||n<=0||n>100)

{

printf("\t输入错误!!!\n\n\t*请重新输入存储时间(年):");

getchar();

}

sum3=p*(1+i*n);

printf("\t**本利和为:%.2lf\n\n",sum3);

}

void D() //投入资金

{

int n;

double sum4,i,p;//p为投入本金

printf("\n\t*请输入本利和:");

while(scanf("%lf",&sum4)!=1||sum4<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入本利和:");

getchar();

}

printf("\t*请输入年利率:");

while(scanf("%lf",&i)!=1||i<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入利率:");

getchar();

}

printf("\t*请输入存款时间(年):");

while(scanf("%d",&n)!=1||n<=0||n>100)

{

printf("\t输入错误!!!\n\n\t*请重新输入存款时间(年):");

getchar();

}

p=sum4/(1+i*n);

printf("\t**投入的本金为:%.2lf\n\n",p);

}

void E()   //投入时间

{

double n;

double sum5,i,p;

printf("\n\t*请输入存储金额:");

while(scanf("%lf",&p)!=1||p<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入存储金额:");

getchar();

}

printf("\t*请输入年利率:");

while(scanf("%lf",&i)!=1||i<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入利率:");

getchar();

}

printf("\t*请输入本利和:");

while(scanf("%lf",&sum5)!=1||sum5<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入本利和:");

getchar();

}

n=(log(sum5/p))/(log(1+i));

printf("\t**投入的时间为:%.0lf\n\n",n);

}

void F()  //利率

{

double sum6,i,p,n;

printf("\n\t*请输入存储金额:");

while(scanf("%lf",&p)!=1||p<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入存储金额:");

getchar();

}

printf("\t*请输入存储时间(年):");

while(scanf("%d",&n)!=1||n<=0||n>100)

{

printf("\t输入错误!!!\n\n\t*请重新输入存储时间(年):");

getchar();

}

printf("\t*请输入本利和:");

while(scanf("%lf",&sum6)!=1||sum6<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入本利和:");

getchar();

}

i=pow((sum6/p),(1/n))-1;

printf("\t**利率为:%.2lf\n\n",i);

}

void G()

{

double sum7,i,p,n;

printf("\n\t*请输入贷款金额:");

while(scanf("%lf",&sum7)!=1||sum7<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入本利和:");

getchar();

}

printf("\t*请输入贷款时间(年):");

while(scanf("%d",&n)!=1||n<=0||n>100)

{

printf("\t输入错误!!!\n\n\t*请重新输入贷款时间(年):");

getchar();

}

printf("\t*请输入年利率:");

while(scanf("%lf",&i)!=1||i<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入利率:");

getchar();

}

p=sum7*i/(12*(1+i)*(pow(1+i,n)-1));

printf("\t**每月等额本息还款为:%.2lf\n\n",p);

}

void H()//计算哪种投资方式的利益最大

{

int n,op=0;

double i,p;

double temp;

double record[4];

printf("\t*请输入存储金额:");

while(scanf("%lf",&p)!=1||p<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入存储金额:");

getchar();

}

printf("\t*请输入年利率:");

while(scanf("%lf",&i)!=1||i<=0)

{

printf("\t输入错误!!!\n\n\t*请重新输入利率:");

getchar();

}
printf("\t*请输入t投资时间(年):");

while(scanf("%d",&n)!=1||n<=0||n>100)

{

printf("\t输入错误!!!\n\n\t*请重新输入投资时间(年):");

getchar();

}
record[0]=p*pow((1+i),n);//复利

I(0,record);

record[1]=p*12*(pow(1+i,n)-1)/i;//等额月投

I(1,record);

record[2]=(p*pow((1+i),n)-1)/i;//等额年投

I(2,record);

record[3]=p*(1+i*n);//单利

I(3,record);

temp=record[0];

for(int j=1;j<4;j++)

{
if(record[j]>temp)

{
temp=record[j];

op=j;
}

}
printf("\t推荐:\n");

I(op,record);
}

void I(int op,double record[4])//判断哪种投资方式的利益最大

{
switch (op)

{
case 0:printf("\t选择复利投资,本利和为%.2lf\n",record[0]);break;

case 1:printf("\t选择等额月投资,本利和为%.2lf\n",record[1]);break;

case 2:printf("\t选择等额年投资,本利和为%.2lf\n",record[2]);break;

case 3:printf("\t选择等单利投资,本利和为%.2lf\n",record[3]);break;

}
}