Malloc basics

// Program to calculate the sum of n numbers entered by the user

#include <stdio.h>
#include <stdlib.h>

int main() {
  int n, i, *ptr, sum = 0;

  printf("Enter number of elements: ");
  scanf("%d", &n);

  ptr = (int*) malloc(n * sizeof(int));
 
  // if memory cannot be allocated
  if(ptr == NULL) {
    printf("Error! memory not allocated.");
    exit(0);
  }

  printf("Enter elements: ");
  for(i = 0; i < n; ++i) {
    scanf("%d", ptr + i);
    sum += *(ptr + i);
  }

  printf("Sum = %d", sum);
  
  // deallocating the memory
  free(ptr);

  return 0;
}

Source: programiz.com

Similar codes

1 vote125 views1 answer
LINEAR AND BINARY SEARCH
C
0 vote110 views1 answer
Go Iterating over an array using a range operator
C
0 vote122 views4 answers
VLOOKUP CHECK #N/A
C
1 vote105 views1 answer
Imprimir valor no octave
C
1 vote116 views4 answers
Could not create cudnn handle: CUDNN_STATUS_INTERNAL_ERROR
C
0 vote109 views1 answer
Adding items to the beginning of a linked list
C
0 vote115 views1 answer
Finding characters in string
C
8 votes138 views3 answers
Casting in c
C
0 vote108 views1 answer
Plt legend top right outside
C
22 votes155 views2 answers
How to combine strings in c
C