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iOS

Posted by maithreya reddy addula
maithreya reddy addula
3,761 Points

Trouble solving the Functions Code Challenge in learning C

Write a function named "addTwo" that accepts two float numbers as arguments. The function should also return a float which is the sum of the two arguments passed to the function.

#include <stdio.h>

int addTwo(float a, float b);
int main(){
    float mom = 9.5;
    float dad = 0.5;
    printf("The myth is %d\n", addTwo(mom,dad));
    return 0;
}

int addTwo(float a, float b){
    return a + b;
}

Amit Bijlani can you please a look at it, when i am running it on my xCode its running fine.

i have one more question do you see in printf statement when i used %f i am getting some strange error but when i tried using %d it worked can you explain it.

5 Answers

Eddie Flores
Eddie Flores
9,110 Points

All you need to write is:

float addTwo(float a, float b){
    return a + b;
}

All it's asking for is the function to be given. In this case, what is above. Make sure that you have it as a "float" if not it won't work.

Edit: Just as a tip, even though you wrote out the whole thing, just make sure that you when you write it in your Xcode compiler, that you have the right associations. I see that you used a %d in your print out, for a float, be sure to use %f.

Taylor Hammons
Taylor Hammons
1,609 Points

How did you know to write that? The question, to me, seemed so vague. I followed the videos in xcode and read the attached readings, and everything, but I had no clue where to begin when I got to this challenge.

Eddie Flores
Eddie Flores
9,110 Points
Eddie Flores
Eddie Flores
9,110 Points

You are not printing a float. You have it set to print an int. This can cause errors. That's why you need to change:

%d to %f

and

int addTwo to float addTwo

John W
John W
21,558 Points
John W
John W
21,558 Points

In code challenges, you only need to satisfy the question, think providing a snippet, or code example. Thus, all you need for this particular challenge is the function itself, i.e. the last 3 lines of your code. (except the function should be returning a float instead of int).

Good job constructing a fully functional program.

maithreya reddy addula
maithreya reddy addula
3,761 Points
maithreya reddy addula
maithreya reddy addula
3,761 Points

thanks guys by the way do you see %d in my printf in the above code. can any one explain me what's happening there when i put %f ?

sorry i was over thinking

Eddie Flores
Eddie Flores
9,110 Points

When using different types of variables, you need to use different letters to call them.

  • Integers are called by %d
  • chars are called by %c
  • floats are called by %f
maithreya reddy addula
maithreya reddy addula
3,761 Points

yeah but here i am using float function right and printing float.

maithreya reddy addula
maithreya reddy addula
3,761 Points
maithreya reddy addula
maithreya reddy addula
3,761 Points

thanks man i got it now