Question

I am getting an error that the variable num was not declared in the scope on the line of code that has; while(num != 5).

Do you know how to fixe this error?

#include <iostream>

#include <iomanip>
#include <string>
#include<fstream>
#include <cstring>
using namespace std;

//Declare the structure
struct Games
{
string visit_team;
int home_score;
int visit_score;
};

// Function prototypes
int readData(Games *&stats);
int menu();
void pickGame(Games *&stats, int size);
void inputValid (Games *&stats, int size);
void homeTotal(Games *&stats, int size);
void visitTotal(Games *&stats, int size);
void displayData(Games *&stats, int size);

int main()
{

//Declare a pointer to the Game structure
Games *stats = nullptr;

//Read in the data from the games.txt text file
//Use the input valid to make sure none of the values are negative
int size =readData(stats);
inputValid(stats, size);

//Create a do-while loop that will continue to iterate through the menu
//until the user decides to exit the program
do
{
//call the menu function, which will display the choices to the user
//and store their choice in a variable
int num = menu();
//Break the choices into cases and complete out the functions accordingly
switch(num)
{
case 1:
displayData(stats, size);
break;
case 2:
pickGame(stats, size);
break;
case 3:
homeTotal(stats, size);
break;
case 4:
visitTotal(stats, size);
break;
case 5:
break;
default:
cout << "Invalid input.\n" <<endl;
}
} while(num != 5);

return(0);
}
//Dynamically allocate the the structure array and read the information into the array
int readData (Games*&stats)
{
int size;
//Games *stats = nullptr;
stats = new Games[size];
stats->visit_team;
stats->home_score;
stats->visit_score;

//open a file to read the games.txt file
ifstream inFile;
inFile.open("games.txt"); //open the text file salsa
if (!inFile)
{
cout << "Error opening data file!\n"; // if the file does not open send an error message to the user

exit(102); //exit the program
}
cout << "Reading data from file \n\n";
inFile >> size;
inFile.ignore();
for (int i = 0; i < size; i++)
{

getline(inFile, stats[i].visit_team);
inFile >> stats[i].home_score;
inFile >> stats[i].visit_score;
inFile.ignore();
}
inFile.close();
return(size);
}
void inputValid (Games *&stats, int size)
{
ifstream inFile; //define infile and outfile
ifstream outFile;
inFile.open("games.txt"); //open the games.txt file
for (int i=0; i< size; i++)
{
if (stats[i].home_score < 0) //Test the value for negative values
{
cout << "Negative values are invalid and will be set to zero.\n\n";
stats[i].home_score = 0; //Set the negative values to 0
outFile >> stats[i].home_score; //write over the negative value as 0 in the games.txt file
}
if (stats[i].visit_score <0)
{
cout << "Negative values are invalid and will be set to zero.\n\n";
stats[i].visit_score = 0; //Set the negative values to 0
outFile >> stats[i].visit_score;
}
}
//Close the file
inFile.close();

}
//Display the menu driven interface for the users to choice which functions they would
//like the program to carry out
int menu()
{
//initialize the variable num to zero
int num = 0;

cout <<"1: Print the information for all the games, in table form." <<endl;
cout <<"2: Print the information for a specific game." << endl;
cout <<"3: Print the total points scored during the season for the home team." << endl;
cout <<"4: Print the total points scored against the home team during the season." << endl;
cout <<"5: Exit the program." << endl;
cout <<"Please enter your choice:" << endl;
cin >> num;
//return the value of num to the main function
return(num);

}
//this function will display the statistics for a particular
//game based on the team name the user inputs
void pickGame(Games *&stats, int size)
{
string name;
//Get the search string from the user
//cin.ignore();
cout << "Enter a specific team name(in caps) for their statistics: ";
cin.ignore();
getline(cin, name);

int location;

// loop through the array of structures
// for each structure the plan is to use .find on the visit_team field
for(int i = 0; i <size; i ++)
{
location = stats[i].visit_team.find(name, 0); //figure out what it returns when it has found the location
if( location >= 0)
{
cout <<"Team: " << stats[i].visit_team << endl << "Home score: "<< stats[i].home_score << endl << "Visit score: " << stats[i].visit_score << endl;
}
}
}
//this function will tally the total number of points the home team has scored
//during the season and display the total
void homeTotal(Games *&stats, int size)
{
int count = 0;
//Calculate the total points scored during the season for the
//home team.
for(int i =0; i <size; i++)
{
count += stats[i].home_score;
}
cout << "The total points scored during the season for the home team was: " << count << endl;
}
//This function will tally the total point scored against the home team for the
//duration of the season
void visitTotal(Games *&stats, int size)
{
int count = 0;
//Calculate the total points scored during the season for the
//home team.
for(int i =0; i <size; i++)
{
count += stats[i].visit_score;
}
cout << "The total points scored against the home team during the season was: " << count << endl;
}
//This function will display all the data in a table form for the user
void displayData(Games *&stats, int size)
{
cout << fixed;
cout << setw(17)<< left<< "Team name: " << setw(26) << right<< " Home score: "<< setw(10)<<right<< "Visiting score:"<< endl;
for(int i =0; i < size; i++)
{
cout << setw(17) << left<<stats[i].visit_team <<setw(18)<<right <<stats[i].home_score << setw(18)<< stats[i].visit_score << endl;
}
}

Answer 1

#include <iostream>

#include <iomanip>
#include <string>
#include<fstream>
#include <cstring>

using namespace std;

//Declare the structure
struct Games {
    string visit_team;
    int home_score;
    int visit_score;
};

// Function prototypes
int readData(Games *&stats);

int menu();

void pickGame(Games *&stats, int size);

void inputValid(Games *&stats, int size);

void homeTotal(Games *&stats, int size);

void visitTotal(Games *&stats, int size);

void displayData(Games *&stats, int size);

int main() {

//Declare a pointer to the Game structure
    Games *stats = nullptr;

//Read in the data from the games.txt text file
//Use the input valid to make sure none of the values are negative
    int size = readData(stats), num;
    inputValid(stats, size);

//Create a do-while loop that will continue to iterate through the menu
//until the user decides to exit the program
    do {
//call the menu function, which will display the choices to the user
//and store their choice in a variable
        num = menu();
//Break the choices into cases and complete out the functions accordingly
        switch (num) {
            case 1:
                displayData(stats, size);
                break;
            case 2:
                pickGame(stats, size);
                break;
            case 3:
                homeTotal(stats, size);
                break;
            case 4:
                visitTotal(stats, size);
                break;
            case 5:
                break;
            default:
                cout << "Invalid input.\n" << endl;
        }
    } while (num != 5);
    
    return (0);
}

//Dynamically allocate the the structure array and read the information into the array
int readData(Games *&stats) {
    int size;
//Games *stats = nullptr;
    stats = new Games[size];
    stats->visit_team;
    stats->home_score;
    stats->visit_score;

//open a file to read the games.txt file
    ifstream inFile;
    inFile.open("games.txt"); //open the text file salsa
    if (!inFile) {
        cout << "Error opening data file!\n"; // if the file does not open send an error message to the user

        exit(102); //exit the program
    }
    cout << "Reading data from file \n\n";
    inFile >> size;
    inFile.ignore();
    for (int i = 0; i < size; i++) {

        getline(inFile, stats[i].visit_team);
        inFile >> stats[i].home_score;
        inFile >> stats[i].visit_score;
        inFile.ignore();
    }
    inFile.close();
    return (size);
}

void inputValid(Games *&stats, int size) {
    ifstream inFile; //define infile and outfile
    ifstream outFile;
    inFile.open("games.txt"); //open the games.txt file
    for (int i = 0; i < size; i++) {
        if (stats[i].home_score < 0) //Test the value for negative values
        {
            cout << "Negative values are invalid and will be set to zero.\n\n";
            stats[i].home_score = 0; //Set the negative values to 0
            outFile >> stats[i].home_score; //write over the negative value as 0 in the games.txt file
        }
        if (stats[i].visit_score < 0) {
            cout << "Negative values are invalid and will be set to zero.\n\n";
            stats[i].visit_score = 0; //Set the negative values to 0
            outFile >> stats[i].visit_score;
        }
    }
//Close the file
    inFile.close();

}

//Display the menu driven interface for the users to choice which functions they would
//like the program to carry out
int menu() {
//initialize the variable num to zero
    int num = 0;

    cout << "1: Print the information for all the games, in table form." << endl;
    cout << "2: Print the information for a specific game." << endl;
    cout << "3: Print the total points scored during the season for the home team." << endl;
    cout << "4: Print the total points scored against the home team during the season." << endl;
    cout << "5: Exit the program." << endl;
    cout << "Please enter your choice:" << endl;
    cin >> num;
//return the value of num to the main function
    return (num);

}

//this function will display the statistics for a particular
//game based on the team name the user inputs
void pickGame(Games *&stats, int size) {
    string name;
//Get the search string from the user
//cin.ignore();
    cout << "Enter a specific team name(in caps) for their statistics: ";
    cin.ignore();
    getline(cin, name);

    int location;

// loop through the array of structures
// for each structure the plan is to use .find on the visit_team field
    for (int i = 0; i < size; i++) {
        location = stats[i].visit_team.find(name, 0); //figure out what it returns when it has found the location
        if (location >= 0) {
            cout << "Team: " << stats[i].visit_team << endl << "Home score: " << stats[i].home_score << endl
                 << "Visit score: " << stats[i].visit_score << endl;
        }
    }
}

//this function will tally the total number of points the home team has scored
//during the season and display the total
void homeTotal(Games *&stats, int size) {
    int count = 0;
//Calculate the total points scored during the season for the
//home team.
    for (int i = 0; i < size; i++) {
        count += stats[i].home_score;
    }
    cout << "The total points scored during the season for the home team was: " << count << endl;
}

//This function will tally the total point scored against the home team for the
//duration of the season
void visitTotal(Games *&stats, int size) {
    int count = 0;
//Calculate the total points scored during the season for the
//home team.
    for (int i = 0; i < size; i++) {
        count += stats[i].visit_score;
    }
    cout << "The total points scored against the home team during the season was: " << count << endl;
}

//This function will display all the data in a table form for the user
void displayData(Games *&stats, int size) {
    cout << fixed;
    cout << setw(17) << left << "Team name: " << setw(26) << right << " Home score: " << setw(10) << right
         << "Visiting score:" << endl;
    for (int i = 0; i < size; i++) {
        cout << setw(17) << left << stats[i].visit_team << setw(18) << right << stats[i].home_score << setw(18)
             << stats[i].visit_score << endl;
    }
}