strdup함수 만들기

#include <stdio.h>
#include <string.h>  
#include <stdlib.h>
char * my_strdup(char *s)
{
 int n;
 char *p;

 n = strlen(s)+1;         // includes null character
 p = (char*)malloc(n);

 strcpy(p,s);

 

 return p;

}

void main()
{

 char *p;

 

 p = my_strdup("HELLO");

 printf("%s\n", p);

 

 free(p);

 p = my_strdup("Hi");

 printf("%s\n", p);

​

}

 

 

 

---

 

 

 

#include <stdio.h>
#include <string.h>  
#include <stdlib.h>
void my_strdup(char **t, char *s)
{
 int n;
 char *p;

 

 n = strlen(s)+1;
 p = (char *)malloc(n);
 strcpy(p,s);

 *t = p;

}

void main()
{

 char *p;

 

 my_strdup(&p,"hi");

 printf("%s\n",p);

 

}