Help understanding

[AKGROWN]

hey guys this is a homework question, so to be straight foward I am NOT looking for ya'll to solve the problem for me. that being said I am writing my second c++ program. I have built a solution and I have 2 errors and 2 warnings. here are the parameters of the assignment

Write a program using the fstream function that will take information from a text file, manipulate the information and output it into a second text file.

here is the source code

//Kraig Holdren
//CS106
//Ken Washington
// March 25, 2010

//This program will take information from the text file "inData.txt"
//manipulate the data and output the results into a seperate text file.

#include <iostream>
#include <fstream>

using namespace std;

int main ()
{
//stream variables
ifstream inFile;
ofstream outFile;
//variables to be calculated
int Sum;
int Product;
char A;

//Tells the program what file to open
inFile.open("inData.txt") ;
//program will create this file for the output
outFile.open("outData.txt") ;

inFile >> A;
outFile << "The character from the file is K" << endl;

inFile >> 10, 10;
Sum = 10 + 10; endl;
outFile << "The Sum of 10 + 10 =" << Sum << endl;

inFile >> 10, 10;
Product = 10 * 10; endl;
outFile << "The Product of 10 * 10 =" << Product << endl;

inFile.close();
outFile.close();

return 0;

}

the errors I am getting are

LINE 32 AND 36: error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'int' (or there is no acceptable conversion)

and 2 warnings

LINE 33, 37: warning C4551: function call missing argument list

Like I said in the begining I dont want you guys to do the assignment for me, I am just thick headed and need help understanding why I have come to these problems

Thanks

Kraig

[Lindley]

inFile >> 10, 10;

What are you trying to do here?

[AKGROWN]

the paramiters of the assignment say to create a text file. on the first line put a letter. on the second line 2 two digit numbers.

the program needs to take that letter and out put

"the character from the file is ___"

"the sum of the two numbers is ____ + ____ = _____"

"the product of the two numbers _____ + _______ = _____

the numbers i choose were 10 and 10. the letter i choose was A.

[Lindley]

Well, that letter and those numbers should be in the input file, not in the source code! The source code should work with an input file containing any letter and pair of numbers.

The error is telling you that an integer literal is not a valid place to store a value read from the file. You need to be reading into an int variable.

Calling the char A actually does work, since A is a valid variable name, but the character stored in A might not be 'A'----it could be anything in the file.

Also, the comma operator does not do what you think it does.

[AKGROWN]

Thanks fou your help Lindley. I ended up having an email marathon with my professor as he helped me figure out the errors. here is the source code if your interested.

//This program will take information from the text file "inData.txt"
//manipulate the data and output the results into a seperate text file.

#include <iostream>
#include <fstream>

using namespace std;

int main ()
{
//stream variables
ifstream inFile;
ofstream outFile;
//variables to be calculated
int Sum;
int Product;
int Number1;
int Number2;
char A;

//Tells the program what file to open
inFile.open("inData.txt") ;
//program will create this file for the output
outFile.open("outData.txt") ;

inFile >> A;
outFile << "The character from the file is A" << endl;

inFile >> Number1 >> Number2 ;
Sum = Number1 + Number2 ;
outFile << "The Sum of 10 + 10 = " << Sum << endl;

inFile >> Number1 >> Number2 ;
Product = Number1 * Number2 ;
outFile << "The Product of 10 * 10 = " << Product << endl;

inFile.close();
outFile.close();

return 0;

}

[krmed]

If you think that's your finished code, what about these two lines:

outFile << "The Sum of 10 + 10 = " << Sum << endl;

outFile << "The Product of 10 * 10 = " << Product << endl;

I believe the Sum of 10 + 10 is 20, no matter what your program says, likewise, the Product of 10 * 10 is 100.

Look at your code closely.

Hope that helps.

[Lindley]

Yes, you should be outputting the variables there rather than hard-coding 10.

[Iliya90]

I can not understand C ++ in any way.

[jeron]