Re: [Dev-C++] system() function errors

[Per W. <pw...@ia...>]

First of all - stop using goto everywhere. You'r logic isn't advanced
enough to need it.

Second - it isn't enough to do
char* quizName = new char;
cin.getline(quizName,123);

new char allocates a single character! If you want a string, you should
either usse "new char[<my_string_length>] or look into the string class.

As long as you do "new char;" you can't expect _any_ part of your program
to work!

/Per W

On Wed, 23 Jun 2004, Noorez Kassam wrote:

> this program is ignoring the system() functions
>
> //quiz maker!
> #include <iostream>
> #include <fstream>
> #include <cstdlib>
> #include <conio.h>
> using namespace std;
>
> class Quiz
> {
>     private:
>         char question[1000];
>         char answerA[1000];
>         char answerB[1000];
>         char answerC[1000];
>         char answerD[1000];
>         char answerT;
>         char answerF;
>         char actual;
>
>     public:
>         static int questionNumb;
>         static int type;
>         Quiz createQuestion();
>         void writeQuestion(Quiz ques, int type,char* quizName);
> };
>
> int Quiz::questionNumb = 1;
> int Quiz::type = 0;
>
> Quiz Quiz::createQuestion()
> {
>     Quiz ques;
>     system("cls");
>     cout << "What kind of question do you want question " <<
> Quiz::questionNumb << " to be\n";
>     real1:
>     cout << "A. Multiple choice.. or B. True/False [a\\b] ";
>     char choice;
>     cin >> choice;
>     cin.sync();
>     if(!(choice == 'a' || choice == 'b'))
>     {
>         cout << "Choice must be a or b\n";
>         goto real1;
>     }
>     if(choice == 'a' || choice == 'A')
>     {
>         type = 1;
>         cout << "\nType the question in\n\n";
>         cin.getline(ques.question,1000);
>         cout << "Type in answer A. ";
>         cin.getline(ques.answerA,1000);
>         cout << "Type in answer B. ";
>         cin.getline(ques.answerB,1000);
>         cout << "Type in answer C. ";
>         cin.getline(ques.answerC,1000);
>         cout << "Type in answer D. ";
>         cin.getline(ques.answerD,1000);
>         real2:
>             cout << "Give us the real answer: ";
>             cin >> ques.actual;
>             cin.sync();
>             if(!(ques.actual == 'a' || ques.actual == 'b'
>               || ques.actual == 'c' || ques.actual == 'd') )
>               {
>                   cout << "Real answer must be a,b,c or d\n";
>                   goto real2;
>               }
>     }
>     if(choice == 'b' || choice == 'B')
>     {
>         type = 2;
>         cout << "\nType in the statement\n\n";
>         cin.getline(ques.question,1000);
>         real3:
>         cout << "Give us the real answer: ";
>         cin >> ques.actual;
>         cin.sync();
>         if(!(ques.actual == 't' || ques.actual == 'f'))
>         {
>             cout << "Real answer must be t or f\n";
>             goto real3;
>         }
>     }
>     return ques;
> }
>
> void Quiz::writeQuestion(Quiz ques, int type, char* quizName)
> {
>     ofstream out_file(quizName,ios::app);
>     if(type == 1)
>     {
>         out_file << "~\n" << questionNumb << ". " << ques.question << '\n'
> << '\n';
>         out_file << "A. " << ques.answerA << '\n';
>         out_file << "B. " << ques.answerB << '\n';
>         out_file << "C. " << ques.answerC << '\n';
>         out_file << "D. " << ques.answerD << '\n';
>         out_file << '~' << ques.actual << '\n';
>     }
>     if(type == 2)
>     {
>         out_file << "~\n" << questionNumb <<  ". " << ques.question << '\n';
>         out_file << "True or False\n";
>         out_file << '~' << ques.actual << '\n';
>     }
> }
>
> int main()
> {
>     cout << "Welcome to the quiz maker.\n";
>     cout << "With this program you can make a Multiple Choice/True or False
> quiz.\n";
>     getName:
>     cout << "We need the name of the quiz file: ";
>     char* quizName = new char;
>     cin.getline(quizName,123);
>     strcat(quizName,".qz");
>     fstream fs(quizName);
>     if(fs)
>     {
>         cout << "File name in use.\n";
>         goto getName;
>     }
>
>     cout << endl << "\nLets start making questions!\n";
>     system("pause");
>     system("cls");
>     Quiz question;
>     char contin;
>     do
>     {
>         question = question.createQuestion();
>         question.writeQuestion(question,Quiz::type,quizName);
>         Quiz::questionNumb = Quiz::questionNumb+1;
>         cout << "\nDo you want to add another question [Y\\N] ";
>         do
>         {
>             cin >> contin;
>
>         }while(contin == 'y' && contin == 'Y' && contin == 'n' && contin ==
> 'N');
>
>     }while(contin == 'y' || contin == 'Y');
> }
>
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