#include <iostream>
#include <fstream>
#include <conio.h>
#include <iomanip>
using namespace std;
void deposit();
void withdraw();
void viewtotal();
void setgoal();
int main(){
	char select;
	cprintf("money manager   ");
	cout<<"\n\n\t<1>deposit"<<endl;
	cout<<"\n\t<2>withdraw"<<endl;
	cout<<"\n\t<3>view total"<<endl;
	cout<<"\n\t<4>set goal"<<endl;
	cout<<"\n\t<0>exit"<<endl;
	cout<<"\n\n\t enter selection:";
	cin>>select;
	if(select=='1'){deposit();}else{
	if(select=='2'){withdraw();}else{
	if(select=='3'){viewtotal();}else{
	if(select=='4'){setgoal();}else{
	if(select=='0')
	    goto mml;
	else{
	main();
	}
	}}}}
mml:   return 0;
}
void deposit()     //存款 
{   double damt=0;
    char ans;
    double num=0;
    ifstream get("deposit.txt");//打开存款文件
	get>>num;//将原文件内取出
	get.close();
	cprintf("deposit  ");
	cout<<"\n\n\t enter deposit amount: $";
	cin>>damt;//输入欲存钱数
	if(damt<=0)
	{
		cout<<"\n\n\n\n\n"<<endl;
		cprintf("       that was an invalid amount..");
		getch();
		main();
	}
	else
	{   cout<<"\n\n\t amount entered<"<<damt<<">."<<endl;
		cout<<"\n\t continue with deposit<y/n>:";
		cin>>ans;
		if(ans=='y'||ans=='Y')
		{   damt=damt+num;
		    ofstream save("deposit.txt");
		    save<<damt<<endl;
		    save.close();
		    cout<<"\n\n\n\n\n"<<endl;
		    cprintf("       yor deposit was successful...");
		    getch();
		    main();
		}
		else
		    main();
		main();
	}
}
void withdraw()  //取款
{
	double wamt=0;
	char ans;
	double num=0;
	ifstream get("withdraw.txt");//打开取款文件
	get>>num;
	get.close();
	cprintf("withdraw  ");
	cout<<"\n\n\t enter withdraw amount: $";
	cin>>wamt;//输入要取款项
	if(wamt<=0)
	{
		cout<<"\n\n\n\n\n"<<endl;
		cprintf("       that was an invalid amount..");
		getch();
		main();
	}
	else
	{
		cout<<"\n\n\t amount entered<"<<wamt<<">."<<endl;
		cout<<"\n\t continue with withdrawal<y/n>:";
		cin>>ans;
		if(ans=='y'||ans=='Y')
		{
			wamt=wamt+num;//支出总额
			ofstream save("withdraw.txt");
			save<<wamt<<endl;
			save.close();
			cout<<"\n\n\n\n\n"<<endl;
			cprintf("       yor withdrawal was successful...");
			getch();
			main(); 
		}
		else
		    main();
		main();
	}
 }
 void setgoal()//存款目标
 {
 	double setamt=0;
 	cprintf("set goal");
 	cout<<"\n\n\t set goal amount:";
 	cin>>setamt;
 	ofstream set("goal.txt");
 	set<<setamt<<endl;
	set.close();
	cout<<"\n\n\n\n\n"<<endl;
	cprintf("       goal amount was set...");
	getch();
	main();
}
void viewtotal()//总体情况
{
	double damt=0;
	double wamt=0;
	double gamt=0;
	double balance=0;
	double newbalance=0;
	ifstream getdeposit("deposit.txt");
	getdeposit>>damt;//存款
	getdeposit.close();
	ifstream getwithdraw("withdraw.txt");
	getwithdraw>>wamt;//支出
	getwithdraw.close();
	ifstream getgoal("goal.txt");
	getgoal>>gamt;//目标
	getgoal.close();
	balance=damt-wamt;//盈余
	cprintf("view totals");
	cout<<"\n\n"<<endl;
	cprintf("              total amounts");
	cout<<""<<endl;
	cprintf("            ===================");
	cout<<"\n\n"<<endl;
	cprintf("deposit total withdraw total balance total");
	cout<<"\n"<<endl;
	cout<<setw(15)<<damt<<setw(25)<<wamt<<setw(20)<<balance<<endl;
	newbalance=gamt-balance;//距离目标差距
	cout<<"\n\n\n"<<endl;
	cprintf("          total balance");
	cout<<""<<endl;
	cprintf("            ===================");
	cout<<"\n\n"<<endl;
	cprintf("set goal total balance total balance left");
	cout<<"\n"<<endl;
	cout<<setw(5)<<gamt<<setw(25)<<balance<<setw(23)<<newbalance<<endl;
	getch();
	main(); 
 } 

最后编译无法通过，显示好几个undefined reference to‘cprintf’

最后显示error ld returned 1 exit status

用的Dev c++ 程序是照着书上原封不动打上去的，新手，不懂怎么改，求指教