Why cant I use my cout overload operator?

Question

Hey guys. I am attempting to build a income calculator program strictly using classes, functions, and overloading the i/o stream operators. However my code keeps on generating an error saying ofStream cant be use as a fucntion but that is not what I am trying to do. Any help is appreciated thanks.

My code is attached.

include <string>

using namespace std;
class IncomeCalc{
const float rate=180.25;
public:
float income;
float hours_per_week;//hours you worked in a week
friend
ostream& operator<<(ostream& out, const IncomeCalc&income);
friend
istream& operator>>(istream&in,const IncomeCalc&hours_per_week);
};
void weekly(){
cout<<"Hello User!"<<"Here you can calculate your weekly income"<<endl;
cout<<"To do so, please insert your weekly hours worked."<<endl;

istream&operator>>(istream&in,const IncomeCalc&hours_per_week){
in>>hours_per_week;
return in;
}
ostream& operator<<(ostream& out, const IncomeCalc&income){
out<< "Wow!"<<" You have earned "<< hours_per_week<<" * "<<rate<<"Which is equal to :"<<endl;
out<<income<<endl;
return out;
}
};
int main(){
IncomeCalc calculate;
cout<<"Bye"<<endl;
return 0;
}

Answer 1

Hi, @New Programmer

There are several errors in the snippet that need to be corrected:

1. Do not define another function in one function definition.
2. There is no need to use const in istream& operator>>. For your reference: Overloading the >> and Overloading the <<
3. Income in ostream& operator<<(ostream& out, const IncomeCalc&income) is a class, not a member.
4. Do not use uninitialized members, you should initialize them in the constructor before using them.

Below is the modified snippet for your reference:

#include <string>  
#include<iostream>  
using namespace std;  
class IncomeCalc {  
	const float rate = 180.25;  
public:  
	float income=0;     //  modified =0  
	float hours_per_week=0;//hours you worked in a week  
	friend  
		ostream& operator<<(ostream& out, const IncomeCalc& incomeCalc);  
	friend  
		istream& operator>>(istream& in, IncomeCalc& incomeCalc);  
};  
void weekly() {  
	cout << "Hello User!" << "Here you can calculate your weekly income" << endl;  
	cout << "To do so, please insert your weekly hours worked." << endl;  
}  //modified { }  
	istream& operator>>(istream & in,  IncomeCalc & incomeCalc) {      // removed const  
		in >> incomeCalc.hours_per_week;    //modified  incomeCalc.hours_per_week    
		return in;  
	}  
	ostream& operator<<(ostream & out, const IncomeCalc & incomeCalc) {  
		out << "Wow!" << " You have earned " << incomeCalc.hours_per_week << " * " << incomeCalc.rate << "Which is equal to :" << endl;  //modified  incomeCalc.  
		out << incomeCalc.income << endl;  
		return out;  
	}  

int main() {  
	IncomeCalc calculate;  
	cout << "Bye" << endl;  
	return 0;  
}  

Best regards,

Minxin Yu

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