strcpy函数

#include <stdio.h>

// Function to implement strcpy() function
char* strcpy(char* destination, const char* source)
{     // return if no memory is allocated to the destination     if (destination == NULL)         return NULL;     // take a pointer pointing to the beginning of destination string     char *ptr = destination;          // copy the C-string pointed by source into the array     // pointed by destination     while (*source != '\0')     {         *destination = *source;         destination++;         source++;     }     // include the terminating null character     *destination = '\0';     // destination is returned by standard strcpy()     return ptr;
}

// Implement strcpy function in C
int main(void)
{     char source[] = "Techie Delight";     char destination[25];     printf("%s\n", strcpy(destination, source));          return 0;
}