Question

Using C Programming,

Write a program that prompts for the user's first and last names. Declare a third array that will hold the user's last name and first name, separated by a comma and space. Use loops to inter through the names one character at a time, storing them into the full name array. Don't forget about the terminating character.
Sample run:
Enter your first name: john
Enter your last name: matthews
First name: John
Last name: Matthews
Full name: Matthews, John

Answer 1

If you have any doubts, please give me comment...

#include<stdio.h>

#include<stdlib.h>

#include<ctype.h>

int main(){

char fname[50], lname[50], fullname[100];

printf("Enter your first name: ");

scanf_s("%s", fname, (unsigned)_countof(fname));

printf("Enter your last name: ");

scanf_s("%s", lname, , (unsigned)_countof(lname));

fname[0] = toupper(fname[0]);

lname[0] = toupper(lname[0]);

printf("First name: %s\n", fname);

printf("Last name: %s\n", lname);

int i=0, k=0;

while(lname[i]!='\0'){

fullname[k] = lname[i];

k++;

i++;

}

fullname[k++] = ',';

fullname[k++] = ' ';

i=0;

while(fname[i]!='\0'){

fullname[k] = fname[i];

k++;

i++;

}

fullname[k] = '\0';

printf("Full name: %s\n", fullname);

return 0;

}