While Loops Help Please
 

Hi all I am learning C++ , but am still pretty new to it I have one problem I am writing a program to simply input a mark and then it gives the corresponding symbol and according to the symbol if its anything above an E it displays you pass and if not it displays you dont , I have had no problem writing this :
[ // Symbol issuing program as per mark out of 100.

#include <iostream>
using namespace std;

int symbol(int mark)
{
if (mark >= 0 && mark <= 39)
return 70;
if (mark >= 40 && mark <= 49)
return 69;
if (mark >= 50 && mark <= 59)
return 68;
if (mark >= 60 && mark <= 69)
return 67;
if (mark >= 70 && mark <= 79)
return 66;
if (mark >= 80 && mark <= 100)
return 65;
}

bool passOrNot (char symb)

{

char A, B, C, D, E , F;
if (symb <= 68 )
return 1;


}

int main()

{

int mark;
char symb;

cout << "Enter marks out of 100 followed by -10 to end inputs and display the results: ";
cin >> mark;
symb = symbol(mark);
cout << "Symbol corresponding to " << mark << " is " << symb;
if (passOrNot (symb))
cout << " You Pass Congratulations!"<< endl;
else
cout << " Unfortunately you fail" << endl;






return 0;
}
]

Except now I want to impliment a While loop into it so that I can enter a number of marks followed by -10 (or any defined number below 0) to end my inputs and display the results of each mark , yet everything I try doesnt work , it either gets stuck in a loop or simply stops on my 1st number entered , Please could somebody help me out here.

Re: While Loops Help Please
 

Basically I have this but entering -10 doesnt end it???

[// Symbol issuing program as per mark out of 100.

#include <iostream>
using namespace std;

int symbol(int mark)
{
if (mark >= 0 && mark <= 39)
return 70;
if (mark >= 40 && mark <= 49)
return 69;
if (mark >= 50 && mark <= 59)
return 68;
if (mark >= 60 && mark <= 69)
return 67;
if (mark >= 70 && mark <= 79)
return 66;
if (mark >= 80 && mark <= 100)
return 65;
}

bool passOrNot (char symb)

{

char A, B, C, D, E , F;
if (symb <= 68 )
return 1;


}

int main()

{


int mark;
char symb;
mark = 1;
while (mark != -10, mark++){
cout << "Enter mark out of 100 , enter -10 to end: ";
cin >> mark;
symb = symbol(mark);
cout << "Symbol corresponding to " << mark << " is " << symb;
if (passOrNot (symb))
cout << " You Pass Congratulations!"<< endl;
else
cout << " Unfortunately you fail" << endl;
}




return 0;
}
]

Re: While Loops Help Please
 

You have an error here:

        while (mark != -10, mark++)

Change it to:

while (mark != -10)

And the program will end when -10 is entered

The next time you post code, please use code tags

Re: While Loops Help Please
 

Thanks very much I cant believe i didnt realise that , works perfectly now .

I just joined today though and am wandering what you meant by PM's asking for help will be ignored?

Thanks

Re: While Loops Help Please
 

You can send Private Messages (PM) to people by clicking on their name and select 'send Private Message'
But I got a lot of PM's of people begging me for source-code and it irritated the hell out of me.
So I added a signature PM's asking for help will be ignored.. so everyone can see that PMing me won't help them.
The signature will display in every message I post.

To add a signature of your own, goto 'control panel' (top of the screen) and click 'edit signature'