对串的赋值算法实现

#include<stdio.h>
#include<string.h>
# define MAX 128 
void main ( ) 
{ 
	char res[MAX]; 
	char des[MAX]; 
    int i=0;
	printf("input the string:");
    scanf ("%s",res); 
	while(res[i]!='\0') 
	{ 
		des[i]= res[i]; 
		i++;
    } 
   des[i]='\0'; 
   printf("%s\n",des); 
}