Finding Average In An Array Of Numbers Using Function

help
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1

I want to prompt the user to enter the values in the array and the size. But something went wrong.

#include <stdio.h>
double calAvg(int arr[], int size);
int main(void) {
  int n = 5;
  int arr[n];
  int num;
  double numAverage;
  printf("Enter the numbers of average: ");
  scanf("%lf", &numAverage);
  printf("Enter the numbers: ");
  scanf("%d", &num);
  double average = calAvg(arr, size);
  printf("Average of entered numbers are %.2lf\n", average);

  return 0;
}
double calAvg(int arr[], int size){
  double total = 0;
  double average;
  for(int i = 0; i < size ; i++){
    total += arr[i];
    average = total/size;
}
return average;
}
2

  1. int n = 5;
    int arr[n];
    This is wrong, you can’t allocate memory like that, either you have to take a constant or Macro like this
    #include <stdio.h>
    #define N 5
    int main(void) {
    int arr[N];
    or should dynamically allocate memory using calloc or malloc

  2. You aren’t storing the values in the array, do something like this
    int i;
    for(i=0;i<N;i++)
    scanf("%d",&arr[i]);

  3. I don’t understand what’s the use of
    int num; double numAverage;

  4.     for(int i = 0; i < size ; i++){
     total += arr[i];
     average = total/size;
 }

    You are adding and dividing at the same time, add the numbers first and then divide the total by the size outside the loop
    for(int i = 0; i < size ; i++){ total += arr[i];} average=total/size;

1 Like
3

// Here is the corrected code…

#include <stdio.h>
#include<stdlib.h>
double calAvg(double* arr, int size);
int main() {
int numAverage;
printf(“Enter the numbers of average: “);
scanf(”%d”, &numAverage);
double* arr=(double*)malloc(numAverage*sizeof(double));
printf(“Enter the numbers: “);
for(int i=0;i<numAverage;i++){
scanf(”%lf”,&arr[i]);
}
double average = calAvg(arr, numAverage);
printf(“Average of entered numbers are %.2lf\n”, average);

return 0;
}
double calAvg(double* arr, int size){
double total = 0;
double average;
for(int i = 0; i < size ; i++){
total += arr[i];
}
average = total/size;
return average;
}