Question

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#pragma warning(disable : 4996) // to avoid scanf error, Visual Studio only
#define MAX_DIM 3
#define STUDENTS 5            // total number of students
int scores[STUDENTS];
int *pScores = NULL;

C language

Implement the function that creates and displays the user name of the user. Ask the
user for their first and last name.
The username is the first letter of first name, followed by the last name. For
instance, if the user's name is John Doe, then the username is jdoe.
The user may input upper or lower case characters for first and last name. Make
sure that the username is all UPPER CASE.
Note : When using fgets(), when you press Enter to finish entering the string, the
Enter (\n) character is also added to the string.
Try to remove that character.

Answer 1

Code:

Code as txt:

#include <stdio.h>
#include <ctype.h>
#include <string.h>

const int max = 50;

void createAndDisplayUserName(char fname[], char lname[]) {
   /* This function creates and displays username */
  
   char username[max];
  
   // username is first character of first name
   username[0] = toupper(fname[0]);
   // and followed by last name
   for (int i = 0; lname[i] != '\0'; i++) {
       username[i+1] = toupper(lname[i]);
   }
   printf("Username is %s.\n", username);
}

int main() {
   char fname[max], lname[max];
   printf("Enter first name: ");
   fgets(fname, max, stdin);
   // remove '\n' character
   int fln = strlen(fname);
   fname[fln-1] = '\0';

   printf("Enter last name: ");
   fgets(lname, max, stdin);
   // remove '\n' character
   int lln = strlen(lname);
   lname[lln-1] = '\0';
  
   createAndDisplayUserName(fname, lname);

   return 0;
}

Sample run:

Enter first name: john Enter last name: Doe Username is JDOE.

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