Our Major Lang IsCAndCPlus Plus/stdlib.h

~cpp
#include <stdlib.h>
#include <stdio.h>

void main( void )
{
   char   *string, *stopstring;
   double x;
   long   l;
   int    base;
   unsigned long ul;
   string = "3.1415926This stopped it";
   x = strtod( string, &stopstring );
   printf( "string = %s\n", string );
   printf("   strtod = %f\n", x );
   printf("   Stopped scan at: %s\n\n", stopstring );
   string = "-10110134932This stopped it";
   l = strtol( string, &stopstring, 10 );
   printf( "string = %s", string );
   printf("   strtol = %ld", l );
   printf("   Stopped scan at: %s", stopstring );
   string = "10110134932";
   printf( "string = %s\n", string );
   /* Convert string using base 2, 4, and 8: */
   for( base = 2; base <= 8; base *= 2 )
   {
      /* Convert the string: */
      ul = strtoul( string, &stopstring, base );
      printf( "   strtol = %ld (base %d)\n", ul, base );
      printf( "   Stopped scan at: %s\n", stopstring );
   }
}

~cpp
#include <stdlib.h>         /* For _MAX_PATH definition */
#include <stdio.h>
#include <malloc.h>

int main( void )
{
   char *string;

   /* Allocate space for a path name */
   string = malloc( _MAX_PATH );

   // In a C++ file, explicitly cast malloc's return.  For example, 
   // string = (char *)malloc( _MAX_PATH );

   if( string == NULL )
      printf( "Insufficient memory available\n" );
   else
   {
      printf( "Memory space allocated for path name\n" );
      free( string );
      printf( "Memory freed\n" );
   }
}

~cpp
#include<stdlib.h> 
#include<stdio.h> 
#include<string.h> 

int main(void) 
{ 
	int i;
	char string_array[10][50]={"John", "Jane",  "Mary", "Rogery", "Dave",  
		"Paul", "Beavis", "Astro",  "George", "Elroy"}; 
	
	/* 정렬 전 */
	for (i = 0; i < 10; i++)
		printf("%s, ", string_array[i]);
	printf("\n");

	/* Sort the list */ 
	qsort(string_array, 10, 50, strcmp);
	
	/* 정렬 후 */
	for (i = 0; i < 10; i++)
		printf("%s, ", string_array[i]);
	printf("\n");

	/* Search for the item "Elroy" and print it */ 
	printf("%s\n",bsearch("Elroy", string_array, 10, 50, strcmp)); 
	
	return 0; 
}