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

29 votes213 views6 answers
Online c compiler for graphics
C
0 vote115 views1 answer
Windows forms picturebox change image
C
0 vote124 views1 answer
Debian unhold packages
C
0 vote123 views1 answer
How to change a variable in c using scanf
C
-1 vote142 views1 answer
Bash while loop n times
C
1 vote128 views2 answers
Yterm urllib.error.HTTPError: HTTP Error 404: Not Found
C
1 vote135 views2 answers
/usr/bin/env: ‘python\r’: No such file or directory
C
3 votes129 views2 answers
Strcpy
C
4 votes127 views3 answers
C program to print the multiplication table
C
0 vote106 views2 answers
Vim vertical line at 80 characters
C