What will be the output of following snippet?

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What is the output of the following snippet?

C++

#include <iostream>

using namespace std;

int op(int i, int j = 1)
{
    return i j;
}

int op (char a, char b)
{
    return b a;
}

int op(float x, float y)
{
}

return xy;

int main()
{
}
    cout << op (2) << op('c', 'a') << op (4.f, 2.f);

What I have tried:

i have tried this program to find out the output ... but my output was wrong may be their are some syntax errors, so that's why i need your help please help me about this .. i am first stage of learning programs i want to learn them in depth so that's why im trying .. i know their are many mistake but i want to correct them. THANKS

Posted 10-Jun-24 5:58am

Member 16282965

Updated 10-Jun-24 7:48am

Dave Kreskowiak

v2

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jeron1 10-Jun-24 13:20pm

Here's a link to simple program, to display the words "Hello World". Take a look at it and see how it differs from what you have in terms of your main() function.

C++ "Hello, World!" Program[^]

Then take a look at how functions work,
C++ Function (With Examples)[^].

Dave Kreskowiak 10-Jun-24 13:50pm

I cleaned up the code in your post so it's more readable.

What's the output of the code you posted? A bunch of compiler errors, nothing more.

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OriginalGriff · Answer 1 · 2024-06-10T06:14:00

You should expect to get syntax errors every day, probably many times a day while you are coding - we all do regardless of how much experience we have! Sometimes, we misspell a variable, or a keyword; sometimes we forget to close a string or a code block. Sometimes the cat walks over your keyboard and types something really weird. Sometimes we just forget how many parameters a method call needs.

We all make mistakes.

And because we all do it, we all have to fix syntax errors - and it's a lot quicker to learn how and fix them yourself than to wait for someone else to fix them for you! So invest a little time in learning how to read error messages, and how to interpret your code as written in the light of what the compiler is telling you is wrong - it really is trying to be helpful!

So read this: How to Write Code to Solve a Problem, A Beginner's Guide Part 2: Syntax Errors[^] - it should help you next time you get a compilation error!

And spending a little time learning to understand syntax error messages will save you a huge amount of time in future: you waited at least 1/4 hour for Chris to reply, then your email system probably added another 10 minutes or so, plus the time it took you to type up the question once you had found this site and created an account. Chances are that you could have saved a significant chunk of that time if you knew how to read them!

And the first thing you need to remember is that you can only return a single value from a function: return takes only one parameter which must be the same type as the function declaration ...

I'm not saying we don't want to help you fix them - sometimes I can't see my own errors because I read what I meant to write - but fixing syntax errors is part of the job, and if you can't do it for yourself people are going to look at you as a bit weird should you get a job in the industry!

And even if you fix all the syntax errors so that at least compiles, there will be no output as the main function contains no code!

CPallini · Answer 2 · 2024-06-10T20:18:00

Before adventuring in function overloading, you should learn, as suggested, to write simple 'hello world' C++ programs.
Anyway, here you are a 'working' implementation of your example.

C++

#include <iostream>
using namespace std;

int op(int i, int j = 1)
{
    return (i * j);
}

int op (char a, char b)
{
    return (b * a);
}

int op(float x, float y)
{
  return static_cast<int> (x * y);
}

int main()
{
  cout << "op(2) = " << op(2) << ", op('c', 'a') = " << op('c', 'a') <<  ", op(4.f,2.f) = " << op(4.f, 2.f) << "\n";
}

What will be the output of following snippet?

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