When to use return function
Hey, im new to c++ when do I use the return 0; alot of people have told me after I am finished writing the program. Others have told me it is only under certain circumstances. What would these circumstances be?
HelpWhen to use return function
Originally Posted by Hunter's Panda
Hey, im new to c++ when do I use the return 0; alot of people have told me after I am finished writing the program. Others have told me it is only under certain circumstances. What would these circumstances be?
As for the return it's what you're wanting to get from the function.
Code:
int add(int i, int p)
{
return i + p;
}
Say you're do some file manipulation, reading some text files, doing a query searching for a specific value and the text file doesn't open. This is like the motherload of text files, 97KB big, thousands of lines, it has ALL your data, and the file doesn't open
Code:
#include <fstream>
#include <string>
#include <iostream>
int main()
{
std::ofstream fileRead;
std::string line;
fileRead.open("c:\\My Awesome Text File.txt");
if (!fileRead) {
std::cout << "Failed to open \"My Awesome Text File.txt\"\nClosing" << std::endl;
return 0;
}
/* process file like normal */
return 0;
}
Originally Posted by InunoTaishou
Calling a function is like breathing, you just do it lol.
As for the return it's what you're wanting to get from the function.
Return 0 specifically if you want to end a function prematurely because of some errors
Say you're do some file manipulation, reading some text files, doing a query searching for a specific value and the text file doesn't open. This is like the motherload of text files, 97KB big, thousands of lines, it has ALL your data, and the file doesn't open
As for the return it's what you're wanting to get from the function.
Code:
int add(int i, int p)
{
return i + p;
}
Say you're do some file manipulation, reading some text files, doing a query searching for a specific value and the text file doesn't open. This is like the motherload of text files, 97KB big, thousands of lines, it has ALL your data, and the file doesn't open
Code:
#include <fstream>
#include <string>
#include <iostream>
int main()
{
std::ofstream fileRead;
std::string line;
fileRead.open("c:\\My Awesome Text File.txt");
if (!fileRead) {
std::cout << "Failed to open \"My Awesome Text File.txt\"\nClosing" << std::endl;
return 0;
}
/* process file like normal */
return 0;
}
Basically what I've been doing is putting it on different sections of errors to debug my code.
For example, say it [1]opens a text file, [2]reads it and [3]prints it.
Return 0 right at the end to say it finished fine, and return 1/2/3 on each of the sections above to debug and see where my code wasn't working.
For example, say it [1]opens a text file, [2]reads it and [3]prints it.
Return 0 right at the end to say it finished fine, and return 1/2/3 on each of the sections above to debug and see where my code wasn't working.
Similar Threads
Combat Arms Hacks & CheatsIs it just me, or when i use the pub hack, i keep on getting disconnected from server
8 Combat Arms Hacks & Cheatswhy disconnects me combat arms when I use the hacks?DA 3 Combat Arms Hacks & CheatsWhy my C.A disconnect when I use hacksSC 14 Combat Arms Discussionswhy doesn't my chams work when i use my chams?
4 Combat Arms HelpWhy do I DC when I use the NEVERBORN'S speed hack?WO 3
8 Combat Arms Hacks & Cheatswhy disconnects me combat arms when I use the hacks?DA 3 Combat Arms Hacks & CheatsWhy my C.A disconnect when I use hacksSC 14 Combat Arms Discussionswhy doesn't my chams work when i use my chams? 4 Combat Arms HelpWhy do I DC when I use the NEVERBORN'S speed hack?WO 3