Return powf result to main function C Programming

Question

I'm trying to make a separate function that takes parameters x and y from the main function use use it in the powf, assign it to a variable 'result' and output it to the main function. Any help is appreciated

#include <stdio.h>
#include <math.h>

int  main() {

  float x = 5.5;
  float y = 3;
  float total = 1;
  int i;


  for( i=0; i <= y; i++ ) {
    total = total * x;
  }

  printf("total = %.3f\n",total);
  printf("Result of powf function is: %.3f\n", result);

  return 0;

}

float mathPow(float x, float y){

  result = powf(x,y);

  return result;

}

You need one of the books from the [curated list](https://stackoverflow.com/questions/562303/the-definitive-c-book-guide-and-list). — StoryTeller - Unslander Monica, Nov 20 '17 at 12:55
You do it in the same way as you call `powf`, except you need to write `float result = powf(x, y);` — Bathsheba, Nov 20 '17 at 13:01
What is the use of `total` here? Plus that loop of yours runs `y+1` times. — Aditi Rawat, Nov 20 '17 at 13:34
Where is `result` defined? Do you want to use some ancient K&R style imlicite definition? — Gerhardh, Nov 20 '17 at 13:34
Don't you get a load of compiler warnings? If not, compile again with all warnings enabled. — Gerhardh, Nov 20 '17 at 13:37
I just couldn't see such a newbie mistake by not calling the function in the main and the for loop mistake. Thanks everyone — Adi, Nov 20 '17 at 16:34

Digvijaysinh Gohil · Accepted Answer · 2017-11-20T13:08:05.207

0

I have modified your code a bit

float mathPow(float x, float y){
  float result = powf(x,y);
  return result;
}
int  main() {

  float x = 5.5;
  float y = 3;
  float total = 1;
  int i;
  for( i=0; i <= y; i++ ) {
    total = total * x;
  }
  printf("total = %.3f\n",total);
  printf("Result of powf function is: %.3f\n", mathPow(x,y));
  return 0;
}

as you can see you did not called the function mathPow() in your main().

In order to execute the User Define functions you need to call them from your main()

edited Nov 20 '17 at 13:08

answered Nov 20 '17 at 12:59

Digvijaysinh Gohil

1,367
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2

This code might work, but does not help in any way to describe what the problems were or how this code fixes them. – crashmstr Nov 20 '17 at 13:03
@crashmstr thanks to pointing it out i have edited my answer – Digvijaysinh Gohil Nov 20 '17 at 13:08
Thank you! It was such a newbie mistake by not calling the function in main... – Adi Nov 20 '17 at 16:35
You are welcome and it's ok we all start at some point – Digvijaysinh Gohil Nov 20 '17 at 16:43

score 0 · Answer 2 · answered Nov 20 '17 at 17:25

0

This is the whole program working

#include <stdio.h>
#include <math.h>


float mathPow(float x, float y);

int  main() {

  float x = 5.5;
  float y = 3;
  float total = 1;
  int i;


  for( i=0; i < y; i++ ) {
    total = total * x;
  }

  printf("total = %.3f\n",total);
  printf("Result of powf function is: %.3f\n", mathPow(x,y));

  return 0;

}

float mathPow(float x, float y){

 float result = powf(x,y);

  return result;

}

answered Nov 20 '17 at 17:25

Adi

9
7

You don't need to post your full code as an answer instead accept an answer which worked for you – Digvijaysinh Gohil Nov 21 '17 at 07:13

Return powf result to main function C Programming

2 Answers2

I have modified your code a bit