Question

(c programming): write a program that contains a function named getName, that does not get any parameter and returns a character array of a random name from a constant list of 30 names, in a global array. the function returns that random name.

each name in the list is a character string that consists of not more than 20 characters(not including finishing 0). the name consists of only characters from the american alphabet (a-zA-Z) and does not contain any "white" characters such as spaces, tabs, newline(\n) etc.

note: the function returns a name(character array) and not an index.

to choose a random name from the list, use the function rand from stdlib.h

additionally, in MAIN() you should read 30 names, and initialize them accordingly. then call getName 10 times and print the randomly chosen name.Note: the names read in main should be different from each other, and the program should not differentiate between lower and uppercase, so for instance if given: "ABC" "aBC" "abC" - they should be considered the same and the program should terminate while outputting which name was given twice.

again, if a name was given twice, even with lower/uppercase, the program should terminate, informing the user he has given the same name twice and outputting which name.

please also make sure that the name does not include \n in the end of the input string.

the input comes from stdin and can come from a file(using redirection) or keyboard.

the program should output a friendly request for an input, and output the names given, before calling getName

Answer 1

Program:

------------------------

#include <stdio.h>
#include <string.h>
#define RAND_MAX 30
/*Global array to hold name*/
char names[RAND_MAX][20];

//Function getName that returns random name from global array
char *getName()
{
    int num = rand()%RAND_MAX;
    return names[num];
}

/*Main Function*/
int main()
{
    int i=0;
    int j=0;
    //request to input names
   printf("Please enter 30 distinct name of your choice, each name seperated by Enter\n");
   //loop to read all the 30 names
   for(i=0;i<30;i++)
   {
       printf("Input For name%d: ",i+1);
       gets(names[i]);
       //loop to check if the name already present
       for (j=0;j<i;j++)
       {
           if(strcasecmp(names[i],names[j]) ==0 )
           {
            printf("The name %s is inputted twice",names[i]);
            exit(0);
           }
       }
   }
   //Print inpuuted names
   printf("\n*****************\nThe names inputted are \n****************");
   for(i=0;i<30;i++)
   {
       printf("\n%d)%s",(i+1),names[i]);
   }


   printf("\n***************\nThe names retrieved by calling getName function are\n**************");
   for(i=0;i<10;i++)
   {
       //Print the name that is retured using getName function
       printf("\n%d)%s",(i+1),getName());
   }
    printf("\n****Program completed successfully....****");
    return 0;
}

Output:

-----------------------

Please enter 30 distinct name of your choice, each name seperated by Enter
Input For name1: Iswarya D
Input For name2: Rams a Sri
Input For name3: Vara K Lakshmi
Input For name4: Jagan Mohan
Input For name5: Sri Devi
Input For name6: Sit risha Siri
Input For name7: Shekhar Pyne
Input For name8: Shekhar Reddy
Input For name9: Wrishin Sarkar
Input For name10: Charbak Roy
Input For name11: Pintu Debnath
Input For name12: Srikar Reddy
Input For name13: Sunith Singh
Input For name14: Manas Nayak
Input For name15: Mani Preeth
Input For name16: Shanuga A saradhu i
Input For name17: Alina Geeta
Input For name18: Ma egha megha
Input For name19: Sravanthi Sravs
Input For name20: Navya Dandu
Input For name21: Leela Narra
Input For name22: Pradhyuman Miyar
Input For name23: Parabs esh Das
Input For name24: Praveen Ki umar
Input For name25: P Bhanu Praksh ah
Input For name26: Agnes Martinen
Input For name27: Roger Clarck
Input For name28: Carolina Rocha
Input For name29: Kasturi Biswar s
Input For name30: Soham Ray

*****************
The names inputted are
****************
1)Iswarya D
2)Rama Sri
3)Vara Lakshmi
4)Jagan Mohan
5)Sri Devi
6)Sirisha Siri
7)Shekhar Pyne
8)Shekhar Reddy
9)Wrishin Sarkar
10)Charbak Roy
11)Pintu Debnath
12)Srikar Reddy
13)Sunith Singh
14)Manas Nayak
15)Mani Preeth
16)Shanuga saradhi
17)Alina Geeta
18)Megha megha
19)Sravanthi Sravs
20)Navya Dandu
21)Leela Narra
22)Pradhyuman Miyar
23)Parabesh Das
24)Praveen Kumar
25)Bhanu Praksah
26)Agnes Martinen
27)Roger Clarck
28)Carolina Rocha
29)Kasturi Biswas
30)Soham Ray
***************
The names retrieved by calling getName function are
**************
1)Manas Nayak
2)Alina Geeta
3)Carolina Rocha
4)Agnes Martinen
5)Praveen Kumar
6)Agnes Martinen
7)Alina Geeta
8)Sunith Singh
9)Charbak Roy
10)Rama Sri
****Program completed successfully....****

Negative Test Output: