IF within a LOOP

This is a discussion on IF within a LOOP within the C++ Programming forums, part of the General Programming Boards category; Please can you help me, I am trying VERY hard to get the program (below) to work, but I cannot ...

  1. #1
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    IF within a LOOP

    Please can you help me,

    I am trying VERY hard to get the program (below) to work, but I cannot get the IF statement to work.

    The program should print a CALEY table, so when the 'b' variable gets to 9 it resets to 1. However, The only place I can put it in the program comes up with an EXPRESSION SYNTAX error.

    I REALLY hope you can help.

    (I highlighted the problem line for your ease).

    Thank-you, Rob.
    #include <stdio.h>

    #include <conio.h>

    int main (void)

    {

    int a = 1;

    int b = 1;

    int c = 1;

    int d = 1;

    clrscr();

    printf("Cayley Table\n\r");

    while (a<=8)

    {

    b=d;

    for (c=1; c<=8

    printf("%d",b) ,b=b+1, if (b>8)b=1 ,c=c+1;

    printf("\n");

    d=d+1;

    a=a+1;

    }

    getch();

    return 0;

    }

  2. #2
    Banned Troll_King's Avatar
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    Code:
    #include<stdio.h>
    int main()
    {
    
    	int x = 3;
    	int y = 5;
    
    	printf("%s", x > y ? "yes" : "no");
    
    	return 0;
    }
    Example of the conditional operator. Does this help?

  3. #3
    Lead Moderator kermi3's Avatar
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    ok...

    what are you trying to get this to do here? I'm having trouble seeing what you want.
    Kermi3

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  4. #4
    and the hat of wrongness Salem's Avatar
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    > printf("%d",b) ,b=b+1, if (b>8)b=1 ,c=c+1;
    You need to write this using some ; to separate statements, and {} to group statements

    Code:
    printf("%d",b);
    b=b+1;
    if (b>8) {
      b=1;
      c=c+1;
    }
    At a guess....
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  5. #5
    Lead Moderator kermi3's Avatar
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    That looks right to me...i think....
    Kermi3

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  6. #6
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    >>>printf("%d",b) ,b=b+1, if (b>8)b=1 ,c=c+1;

    I see a HUGE problem with that line. This program shouldn't even compile (I'm guess it doesn't, and that's your problem). You've got to separate statements with ;'s, not ,'s. Also, you should break your code up into sections (by using brackets) to make it more readable). Properly formatted and terminated, that line should be:

    printf("%d",b);
    b=b+1;
    if ( b > 8 )
    b=1;
    c=c+1; //This line is NOT part of the condition, it will be executed no matter what the if statement evaluates to.

    Hope that helps...

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