[RESOLVED] Problem implementing ToUpper

I have searched and tried so many combinations to implement ToUpper into my program but it simply doesn't work so I'm resorting to the message boards!

I'm coding in C# and I use Visual 6 C++ at Uni and Codeblocks at home and it works on neither.

Currently I'm using (repeatTest=='Y' || repeatTest=='y') but I want to implement <ctype.h> and ToUpper so that even if a lowercase y is entered it still accepts it.

I've tried

char repeatTest = repeatTest.ToUpper();
repeatTest = repeatTest.ToUpper();

both say 'ToUpper' in something not a structure or union

and many other combinations.

Here's my working code

Code:

---

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main()
{
        char repeatTest='Y';

        while (repeatTest=='Y' || repeatTest=='y')
        {
                char answer=0, correctAnswer=0, questionNumber=1, testResult=0, NumberOfQuestions=1;
                srand (time(0));

                printf ("Test will begin, good luck\n\n\n\n");

                for (NumberOfQuestions=0; NumberOfQuestions!=10; NumberOfQuestions++) {
                        int randomValue1=rand()%12+1;
                        int randomValue2=rand()%12+1;
                        printf("%i. What is %i x %i?    ",questionNumber, randomValue1, randomValue2);
                        scanf("%i", &answer);

                        if (answer==(randomValue1*randomValue2)){
                        printf ("Correct\n\n");
                        ++correctAnswer;
                        ++questionNumber;
                        }

                        else {
                                printf ("Incorrect\n\n");
                                ++questionNumber;
                        }
                }

              testResult = correctAnswer * 10;
              printf ("You answered %i%% of the questions correctly\n\n",testResult);
              "\n\n";
              printf ("Would you like to have another go? Y or N\n\n");
              scanf (" %c", &repeatTest);

                if (repeatTest=='N' || repeatTest=='n'){
                        return 0;
                }

              system("cls");

        }
    system("pause");
}

---

Any responses would be appreacted

Quote:

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Originally Posted by cassas00

I have searched and tried so many combinations to implement ToUpper into my program but it simply doesn't work

---

http://www.cplusplus.com/reference/cctype/toupper/

Quote:

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I'm coding in C#

---

Some advice -- don't use C# as a guide in attempting to write C++ code.

Regards,

Paul McKenzie

Ah, I think I'm getting too far ahead of myself. I'll wait to see how my tutor implements it in c# in my upcoming lessons rather than using c++ code lol thanks!

Code:

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while (repeatTest=='Y' || repeatTest=='y')

---

becomes

Code:

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while(toupper(repeatTest) == 'Y')

---

note lowercase.

you could also have

Code:

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repeatTest = toupper(repeatTest);

---

after the scanf.

You also need

Code:

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#include <ctype.h>

---

at the beginning of the program.

Paul offered some good advice - although in certain respects c# bears some resemblance to c++, don't use it as a guide as to how to write c++ programs.