bool findTitlePrice function code help

[16800960]

The Code is as Follows

bool findTitlePrice(string allTitles[], double allPrices[],
int totalRec, string title, double & price)
{
for(int i=0; i < totalRec; i++)
{
// your code here:
// for each element of array allTitles, check if it matches
// the given title, i.e. if title and allTitles[i] are the same;
// if yes, fetch the corresponding price from
// the array allPrices and exit the function (returned value: true)
}
// your code here:
 
 

as theya re not included in this code i have given an outline of two previous functions which join on the program i wrote previously

Int totalrec=2

maxsize of the arrays = 300


currently stored values is 3 with 2 having titles and prices

being value 1 and value 2

Basically i need help to write this function

any information can be provided easily

basically i know if it doesn't occur Return False;

else Return true;

as the data is currently stored in two elements we can check those two ideally though a function to potentially check all possible slots would be better

i was thinking an I++ until == 300


Any Help would Be Greatly Appriciated Thanks

I Realised that a check is needed on array all titles with a cin string search so maybe a linear search type function possibly. if so how to define this ?

[Dheeraj Joshi]

Take each record from the allTitles array in for loop and compare it with the title. Use strcmp to do the comparison.
And if they are same then fetch the value from the allPrices array at the ith index and return the value.

Some questions, Does your function return the price? Then why you have declared the return type as boolean?

Regards
Dheeraj Joshi

[16800960]

No it doesn't it is meant to be a find match then return bool type so i chose true and false as the representative terms

Dheeraj

how would i express this yes it is meant to check the array all titles then return the value say ith record in the allprices array as well as they store the same amount of records and are matched arrays so if it was say record 3 in titles that matches the input string then grab the price from the 3rd element in allprice if it doesn't match on title return value false.

could you right up a function to do this as a guide as i haven't used strcmp before

I am greatful for you help.

[weaknessforcats]

Since you are using string objects for titles, you must be using C++.

Because of that you should not be using either arrays or strcmp. Instead of the array, use a vector<string>. You can then use the string compare functions rather than strcmp.

strcmp only works for C strings and not C++ strings.

vector<string> allTitles;
//etc...
 
if (allTitles[i] == "The C++ Puzzle Book")
//etc...
 
string obj("The C++ Puzzle Book")
 
if (allTitles[i] == obj)
//etc...

[16800960]

That maybe true but program specifications are to use arrays so that is whyI have done so basically all i need is the statement to check if cin >> "title" matches array alltitles [i] if there is a match grab the corresponding price from the allPrices [i] as an example i already know to return true if condition is met and return false if it does not match just need to figure out how to write the check and determine if i have prototyped and initialized the function correctly.


Thanks


I was thinking along the lines of

if [title == Alltitles [i]] i know that isn't valid of course

but an if loop which compares the cin string value to the array and then as the arrays are matched then pulls the eqivilant element from the all prices


so if the cin string was equal to postion 3 in the allTiltes array then pull in the price in position 3 in the Prices array


Else if it doesn't match anything return false;

the logic is easy but i haven't got the check working correctly at this stage though. that is the main thing i am worried about.

though do not remove the function BoolFindTitle () as that is a require element.

Any help would be greatly appreciated

[16800960]

Here is the code i have at the moment there ar eno complier errors but want to make sure that the function is set to check the cin inut matches any element in the ararys

 
# include <iostream>
# include <string>
# define MAXSIZE = 300
using namespace std;
 
bool findTitlePrice(string allTitles[300], double allPrices [300],int totalRec,string title,double price);
 
 string allTitles[300] = {
        "Book 1",
        "Book 2"};
    double allPrices[300] = {
        78.5, 66.
    };
int main () 
{
 
 
bool findTitlePrice(string allTitles [300], double allPrices [300],int totalRec,string title,double price); 
 
 
 
int totalRec =2; 
  for(int i=0;i<totalRec;i++); 
 
    string Title;
    string allTitles [300];
   cout << "Please Enter Title";
    cin >> Title;
if (Title == allTitles [300])
cout <<"Value Found";
 
if (Title != allTitles [300]) cout << " Book Not Found ";
 
system ("pause");
 
 
         }
 
 

I would love to ensure that i have done this correctly i know that std:: string with an == check may do this would the function i have applied achieve the same result if so how do i set it to return true if it is equal and pull the price from the equivalent element in the prices array as that if element 0 matches pull that in and pull price 0 in as well as they are " linked " arrays



I know it is missing return true for the matching and return false for the not = function
Any help on this would be most appreciated thanks for your time

[Dheeraj Joshi]

if (Title == allTitles [300])
cout <<"Value Found";
 
if (Title != allTitles [300]) cout << " Book Not Found ";
 
system ("pause");
 

This is wrong. You are always checking the title with the 300th element of the array, where the data which you are interested will not be present. And i am not sure about usage of "==" operator for string comparison. And your for loop is ended with a semicolon. It is wrong.

Your loop should look like this:

for(int i=0;i<totalRec;i++)
{
   char * book_at_i = allTitles [i])
   if(strcmp (title,book_at_i) == 0)
   {
     return true;
   }
}
return false;
 

Regards
Dheeraj Joshi

[16800960]

@dheerajjoshim
I figured that the choice of field was wrong but can you help me define my code better


Basically

Say write a check if
cin value >> "Title" ==
allTitles []

cout "the Book was found"
return true


else
cout << "Book not found"
return false"

the code you seem to write is C

i need C++ to deal with the array checks can you use my code and change it to meet my requirements if possible


i figured i had used at least two semicolons i didn't need but it complies without errors


It would be right to intialize Totalrec=2 (while i=0 <TotalRec I++) maybe a strCMP or as i have been told something like if Title == allTitles [i] ?
any help on this would be greatly appriciated
please

[Dheeraj Joshi]

What made you to conclude that the code written by me won't work ?

And where is your function definitions? I can not see any opening curly braces for function?

Can you post latest code if you have?

Regards
Dheeraj Joshi

[16800960]

I don't know that he code you posted doesn't work if i offended you i am sorry


The code above is the latest another variation is as follows if it is more usable

# include <iostream>
# include <string>
# define MAXSIZE = 300
using namespace std;
 
bool findTitlePrice(string allTitles[300],double allPrices[300],int totalRec, string title,double & price);
 
    string allTitles[300] = {
        "Book 1",
        "Book 2"
    };
    double allPrices[300] = {
        78.5, 66.
    };
int main ()
{
bool findTitlePrice(string allTitles[], double allPrices[], int totalRec, string title, double & price);
{  
     int totalRec = 2;
     for (int i=0; i<totalRec; i++)
     {
         string title;
 
         cin >> title;
         if (title==allTitles[i])
         {
             return true;
         }
     else if (title!=allTitles[i])
     return false;  }//End of For Statment
 
 
}
system ("pause");}
 
 
 

I think this is closer to the required but still is not performing the check correctly

Some of the functions don't have curly braces most already have the correct braces from what i can see which functions are missing them ? im assuming as the compiler reports no errors on either of these


any corrections are much appreciated thanks again