Copy strings in C language

In C, you can use strcpy to copy strings.
The header file is string.h

// copy string in c
strcpy(ch,n,p)

Example：

/*
Example:copy string  in C language
*/

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <stdbool.h>
#include <errno.h>

int main()
{
  char str1[9]="string1";
  char str2[9];
  char str3[40];
  strcpy(str2,str1);
  strcpy(str3,"Hello lautturi world");
  printf("str1: %s\nstr2: %s\nstr3: %s\n", str1, str2, str3);
  return 0;
}