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dynamic method problem

varsha222001 profile image varsha222001 ・1 min read

Problem
How to display and calculate the sum of n numbers by using dynamic memory allocation function in C language?

Solution
Following is the C program to display the elements and calculate the sum of n numbers by the user by using dynamic memory allocation functions. Here, we also try to reduce the wastage of memory.

Example

include

include

void main(){
//Declaring variables and pointers,sum//
int numofe,i,sum=0;
int p;
//Reading number of elements from user//
printf("Enter the number of elements : ");
scanf("%d",&numofe);
//Calling malloc() function//
p=(int *)malloc(numofe*sizeof(int));
/*Printing O/p - We have to use if statement because we have to check if memory has been successfully allocated/reserved or not
/
if (p==NULL){
printf("Memory not available");
exit(0);
}
//Printing elements//
printf("Enter the elements : \n");
for(i=0;i<numofe;i++){
scanf("%d",p+i);
sum=sum+*(p+i);
}
printf("\nThe sum of elements is %d",sum);
free(p);//Erase first 2 memory locations//
printf("\nDisplaying the cleared out memory location : \n");
for(i=0;i<numofe;i++){
printf("%d\n",p[i]);//Garbage values will be displayed//
}
}
Output
When the above program is executed, it produces the following result −

Enter the number of elements: 4
Enter the elements:
23
45
67
89
The sum of elements is 224
Displaying the cleared out memory location:
7410816
0
7405904
0

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