释放已分配的块 free

[c]代码库

#include <string.h>
#include <stdio.h>
#include <alloc.h>

int main ( void )
{
	char *str;

	/* allocate memory for string */
	str = malloc ( 10 );

	/* copy "Hello" to string */
	strcpy ( str, "Hello" );

	/* display string */
	printf ( "String is %s\n", str );

	/* free memory */
	free ( str );

	return 0;
}