www.pudn.com > c.rar > memalloc.c

/* Demonstrates the use of malloc() to allocate storage */ 
/* space for string data. */ 
 
#include  
#include  
 
char count, *ptr, *p; 
 
int main( void ) 
{ 
   /* Allocate a block of 35 bytes. Test for success. */ 
   /* The exit() library function terminates the program. */ 
 
   ptr = malloc(35 * sizeof(char)); 
 
   if (ptr == NULL) 
   { 
       puts("Memory allocation error."); 
       return 1; 
   } 
 
   /* Fill the string with values 65 through 90, */ 
   /* which are the ASCII codes for A-Z. */ 
 
   /* p is a pointer used to step through the string. */ 
   /* You want ptr to remain pointed at the start */ 
   /* of the string. */ 
 
   p = ptr; 
 
   for (count = 65; count < 91 ; count++) 
       *p++ = count; 
 
   /* Add the terminating null character. */ 
 
   *p = '\0'; 
 
   /* Display the string on the screen. */ 
 
   puts(ptr); 
 
   free(ptr); 
 
   return 0; 
}