#include<stdio.h>
#include <math.h>
#include<stdlib.h>
void fuli(){
double F,P,I;
int M,N;
system("cls");
printf(" 欢迎进入复利计算软件 ");
printf("请输入存入本金:");
scanf("%lf",&P);
printf("请输入年利率:");
scanf("%lf",&I);
printf("请输入存入年限:");
scanf("%d",&N);
printf("请输入年复利次数:");
scanf("%d",&M);
printf("本金 年利率 存入年限 年复利次数 ");
printf("%.2lf %.2lf %d %d",P,I,N,M);
I=pow((1+I/M),M)-1;
F=P*pow((1+I),N);
printf(" 输出复利终值结果：%.2lf ",F);
}
void danli()
{
double F,P,I;
int N;
system("cls");
printf(" 欢迎进入单利计算软件 ");
printf("请输入存入本金:");
scanf("%lf",&P);
printf("请输入年利率:");
scanf("%lf",&I);
printf("请输入存入年限:");
scanf("%d",&N);
printf("本金 年利率 存入年限 ");
printf("%.2lf %.2lf %d ",P,I,N);
F=P+P*I*N;
printf(" 输出复利终值结果：%.2lf ",F);
}
void benjin()
{
double F,P,I;
int M,N;
system("cls");
printf(" 欢迎进入本金计算软件 ");
printf("请输入终值:");
scanf("%lf",&F);
printf("请输入年利率:");
scanf("%lf",&I);
printf("请输入存入年限:");
scanf("%d",&N);
printf("请输入年复利次数:");
scanf("%d",&M);
printf("终值 年利率 存入年限 年复利次数 ");
printf("%.2lf %.2lf %d %d",F,I,N,M);
I=pow((1+I/M),M)-1;
P=F/pow((1+I),N);
printf(" 输出本金结果：%.2lf ",P);
}
void nianfen()
{
double F,P,I,N;
int M;
system("cls");
printf(" 欢迎进入投资年限计算软件 ");
printf("请输入终值:");
scanf("%lf",&F);
printf("请输入年利率:");
scanf("%lf",&I);
printf("请输入本金:");
scanf("%lf",&P);
printf("请输入年复利次数:");
scanf("%d",&M);
printf("终值 年利率 本金 年复利次数 ");
printf("%.2lf %.2lf %.2lf %d",F,I,P,M);
I=pow((1+I/M),M)-1;
N=log(F/P)/log(1+I);
printf(" 输出投资年限估计：%lf ",N);
}
package fuli;
import java.sql.*;
public class mysql {
static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
static final String DB_URL = "jdbc:mysql://localhost/test";
static final String USER = "root";
static final String PASS = "root";
int i=1;
double output(String gongsi,String putinto,String earnings,String year,String money) throws SQLException{
Connection conn = null;
Statement stmt = null;
//STEP 2: Register JDBC driver
try {
Class.forName(JDBC_DRIVER);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//STEP 3: Open a connection
conn = DriverManager.getConnection(DB_URL,USER,PASS);
//STEP 4: Execute a query
stmt = conn.createStatement();
String sql;
sql = "SELECT * FROM touzi";
ResultSet rs = stmt.executeQuery(sql);
int r=1;
double sum=0;
//STEP 5: Extract data from result set
while(null != rs && rs.next()){
System.out.println(rs.getString("putinto"));
System.out.println(rs.getString("earnings"));
System.out.println(rs.getString("number"));
System.out.println();
r++;
sum=Double.parseDouble(rs.getString("money"))+sum;
}
String I = Integer.toString(i);
String sql1 = "INSERT INTO touzi(number,gongsi,putinto,earnings,year,money) VALUES(";
sql1=sql1+"'"+I+"'"+','+"'"+gongsi+"'"+','+"'"+putinto+"'"+','+"'"+earnings+"'"+','+"'"+year+"'"+','+"'"+money+"'"+')';
i++;
System.out.print(sql1);
stmt.executeUpdate(sql1);
rs.close();
stmt.close();
conn.close();
return sum;
}
void lilv()
{
double F,P,I;
int M,N;
system("cls");
printf(" 欢迎进入投资项目利率计算软件 ");
printf("请输入终值:");
scanf("%lf",&F);
printf("请输入本金:");
scanf("%lf",&P);
printf("请输入存入年限:");
scanf("%d",&N);
printf("请输入年复利次数:");
scanf("%d",&M);
printf("终值 本金 存入年限 年复利次数 ");
printf("%.2lf %.2lf %d %d",F,P,N,M);
I=pow(pow(F/P,1.0/N),1.0/M)*M-M;
printf(" 输出投资项目利率：%lf ",I);
}
void dingqi(){
double F,P,I;
int N;
system("cls");
printf(" 欢迎进入定期投资软件 ");
printf("请输入年投入:");
scanf("%lf",&P);
printf("请输入年复合增长率:");
scanf("%lf",&I);
printf("请输入持续投入年数:");
scanf("%d",&N);
printf("年投入 年复合增长率 持续投入年数 ");
printf("%.2lf %.2lf %d ",P,I,N);
F=P*(1+I)*pow((1+I),N-1)/I;
printf(" 输出结果：%.2lf ",F);
}
main()
{
int i;
printf(" 欢迎进入单复利计算软件3.0 ");
printf(" 1.单利计算");
printf(" 2.复利计算");
printf(" 3.求本金");
printf(" 4.求投资年限");
printf(" 5.求投资项目利率估计");
printf(" 6.定期投资");
printf(" 请输出选择项:");
scanf("%d",&i);
switch(i)
{
case 1:
danli();
break;
case 2:
fuli();
break;
case 3:
benjin();
break;
case 4:
nianfen();
break;
case 5:
lilv();
break;
case 6:
dingqi();
break;
default:
return 0;
}
}