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 vote147 views1 answer
C define
C
0 vote177 views1 answer
Add field to model rails
C
0 vote153 views1 answer
C read file content
C
0 vote187 views1 answer
Bp result system
C
0 vote164 views3 answers
Plt circle
C
1 vote136 views1 answer
Default font for material ui
C
0 vote163 views1 answer
How to take comma separated integer input in c
C
21 votes184 views6 answers
Mkv to mp4
C
2 votes179 views1 answer
Ln: failed to create symbolic link 'protoc': File exists
C
2 votes158 views1 answer
Typedef vs #define
C