#include <stdio.h>
#include <string.h>
int main(int argc[], char *argv[])
{
 char firstName[20];
 char lastName[20];
 char fullName[41];
printf("Enter your name: ");
 scanf("%[^\n]s", firstName);
// following line work on Windows only so uncomment if you use windows
//fflush(stdin);
// for some reason fflush doesn't work on OS X as it does on Windows
fpurge(stdin); // use this on POSIX standard machines or comment out if you use Windows
printf("Enter your surname: ");
scanf("%[^\n]s", lastName);
/* The following 3 statements are doing the following thing:
Append name to fullName array and concatenate it with 1 space and lastName variables.
It's ready for later printing.
 */
strcpy(fullName, firstName);
strcat(fullName, " ");
strcat(fullName, lastName);
// I'm using (int)strlen(fullName) casting here to convert size_t parameter to int while printing
printf("Your name is %s, and the length of the array is %d\n", fullName, (int)strlen(fullName));
fpurge(stdin); // you can use fflush(stdin) if you prefer, but it's Windows only function
getchar();
return 0;
}