Question

C++ Please     Contact list - functions & parallel arrays/CStrings

No Vectors can be used since we haven't learned them yet !!

A contact list is a place where you can store a specific information with other associated information such as a phone number, email address, birthday, etc. Write a program that will read 5 data pairs into two parallel arrays. Data pairs consist of a name (as a CString) and a GPA (double). That list is followed by a name, and your program should call a function that will search the name array and return the corresponding gpa that will be output from main(). If the name is not in the array, the function should return -1.

A single name would be stored as a CString (character array). Because we are storing multiple names, we will use a 2-dimensional array. You may assume names will not be longer than 15 characters.

| J | o | e | \0|   |   |
| L | i | n | d | a | \0|
| F | r | a | n | k | \0|
| S | a | l | l | y | \0|

Ex: If the input is:

Joe 3.7 Linda 2.8 Frank 3.0 Mark 2.5 Sally 4.0 
Frank

the output is:

3.0

Your program must define and call the following function. The return value of GetGPA is the gpa associated with the target name.
double GetGPA(char names[ ][ ], double gpas[ ], char targetName[ ])

Hint: Use two separate arrays: One for the CString names, and the other for the gpas.

#include <iostream>
#include <cstring>         // Cstring functions
#include <iomanip>         // format output
using namespace std;

// array size constants
const int NAME_SIZE = 15;
const int SIZE = 5;

/* Define your function here */

int main() {
  
   // declare arrays
   char names[SIZE][NAME_SIZE];
   double gpas[SIZE];
  
   /* Type your code here */

   return 0;
}

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

#include <iostream>

#include <cstring>         // Cstring functions

#include <iomanip>         // format output

using namespace std;

// array size constants

const int NAME_SIZE = 15;

const int SIZE = 5;

/* required function */

double GetGPA(char names[SIZE][NAME_SIZE], double gpas[], char targetName[]){

                //looping and searching for targetName in names

                for(int i=0;i<SIZE;i++){

                                if(strcasecmp(names[i],targetName)==0){

                                               //found, returning the gpa

                                               return gpas[i];

                                }

                }

                //not found

                return -1;

}

int main() {

   // declare arrays

   char names[SIZE][NAME_SIZE];

   double gpas[SIZE];

   /* looping and reading names and gpas */

   for(int i=0;i<SIZE;i++){

                                cin>>names[i];

                                cin>>gpas[i];

   }          

   //declaring a char array and reading target name

   char targetName[NAME_SIZE];

   cin>>targetName;

   //finding gpa

   double gpa=GetGPA(names,gpas,targetName);

   //setting a fixed precision of 1 digit

   cout<<setprecision(1)<<fixed;

   //if gpa returned is -1, printing 'Not found', or if you want to display -1

   //, just cout the gpa as it is.

   if(gpa==-1){

                //not found

                cout<<"Not found!"<<endl;

   }else{

                //found,displaying gpa

                cout<<gpa<<endl;

   }

   return 0;

}

/*OUTPUT*/

Joe 3.7 Linda 2.8 Frank 3.0 Mark 2.5 Sally 4.0

Frank

3.0