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

0 vote428 views1 answer
*** AttributeError: module 'cv2.cv2' has no attribute 'drawKeypoints'
C
0 vote400 views1 answer
Arduino uno spi pins
C
22 votes424 views6 answers
ModuleNotFoundError: No module named 'cv2'
C
0 vote454 views1 answer
Pre and post increment in c
C
0 vote424 views1 answer
C sort odd even program
C
0 vote339 views1 answer
What is stdin fd number
C
1 vote424 views1 answer
Remove on condtion in vec rust
C
0 vote403 views2 answers
How to select multiple non-consecutive words on mac
C
2 votes430 views2 answers
How to store a user input with spaces in c
C
0 vote365 views1 answer
How to belu-roll peoples in c
C