Computer Programming C Laboratory: Pointers C Programs

Write a C program to demonstrate malloc() function (using pointers)

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using pointers - C Programming

Write a C program to demonstrate malloc() function.

/* C Program to demonstrate malloc() function */

#include <stdio.h>

#include <string.h>

#include <alloc.h>

#include <process.h>

int main(void)

{

Local definitions */

char *str;

/* Statements */

clrscr();

if ((str= (char *)malloc(10)) == NULL) /* memory allocation to str */

{

printf("Not enough memory to allocate buffer\n");

exit(1);

} /* if */

strcpy(str, "Hello"); /*String copy */

printf("String is %s\n", str);

free (str); /* free the memory space */

getch();

return 0;

} /* main */

OUTPUT

String is Hello

EXPLANATION: In the above program, the pointer variable str is declared as a character type variable. The if statement checks the condition (str=(char*)malloc(10)==NULL) or not, if condition true then prints the statement "Not enough memory to allocate buffer" and exit. Here, in the declaration 10 bytes are allocated to pointer variable str of type char. The strcpy function copy the string Hello to pointer variable str then prints the string str and make free the memory space fo str variable.

Computer Programming C Laboratory: Pointers C Programs : Tag: C Programming : - Write a C program to demonstrate malloc() function (using pointers)

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Computer Programming C Laboratory: Pointers C Programs

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