hi, i can do this .
here is a previous sample.
int main()
{ char message[500];
char name[500];
char a;
strcpy (name, FIRST_NAME); // name= first_name
strcat(name," "); //adding " " at end of first_name
strcat(name,LAST_NAME); //adding last_name at end of previous name
strcpy (message, "Good morning ");
strcat(message,name);
strcat(message,".");
puts(message);
scanf(" ",&a);
return 0;
}