CODEWITHSUNDEEP
c++classexceptioncomposition
mmccss
mmccss

Reputation: 1

How can i solve the error that in argument to unary?

#include<iostream>
#include<fstream>
#include<string>
using namespace std;




int main(){
    const char *months[12]={"January", "February", "March", "April","May", "June", "July", "August","September", "October", "November", "December"}; // to check month is that true or false.
    int day,year;
    string first,last,month;
    Person p(first,last,day,month,year);
    ifstream infile;                   //opening input file
    infile.open("input.txt"); 

    while(!infile.eof()) {

        }
    }
}

I check the values in the Input file and print the correct ones in the output file.I call the setmonth function to check if the month is correct after checking if the day and year are correct in the Input file.

HOW CAN I SOLVE THIS ERROR? AND WHAT IS printInfo FUNCTION PARAMETER?

Upvotes: 0

Views: 197

Answers (1)

john
john

Reputation: 87997

So the first problem is that you write 

if(!p.setMonth(month))

which means that setMonth should return a value that can be passed to !. But if you look at setMonth you see this

void setMonth(string m){}

setMonth is a void function, it doesn't return anything so !p.setMonth() is illegal.

Probably it should return a bool

bool setMonth(string m) { ... }

I imagine that void printInfo(ostream){} should be void printInfo(ostream&){}.That's the normal way to pass an output stream to a function.

Upvotes: 1

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