C/C++ How do I get main to print out an error from a function?

[firekid123]

I'm having trouble with printing out an error with cerr in the main function when there's an error in another function.


Example:

int main (){
//body
//statements

function (//parameters);
cerr<<"there's a problem"<<endl;
}
int function (//parameters){
if a < b
return -1;
else
return 0;
}

How would I get main to print out the error of the function?

 

[diazona]

If the return value of the function is what indicates that there was an error, you need to check the return value in an if statement.

if (/*error value*/ == function(/*parameters*/)) {
  // ...
}

 

[firekid123]

Thanks, that worked.

 

[AlephZero]

For a more general way where you don't have to remember to check the return value from every function call, find out about exception handling and the throw and catch statements.