Usage of strcpy, strcat, strcmp (strings) in c

 #include<stdio.h>

#include<string.h>

int main()

{

char *st = "Nilabhru";

char st2[45];

strcpy(st2,st);

printf("now the st2 is %s",st2);

return 0;

}

#include<stdio.h>

#include<string.h>

int main()

{

char st1[45] = "Hello";

char *st2 = "Nilabhru";

strcat(st1,st2);

printf("now the st2 is %s",st1);

return 0;

}

#include<stdio.h>

#include<string.h>

int main()

{

char st1[45] = "Hello";

char *st2 = "Nilabhru";

int val = strcmp(st1,st2);

printf("now the st2 is %d",val);

return 0;

}