'if' 'alway's true.

This is a discussion on 'if' 'alway's true. within the C Programming forums, part of the General Programming Boards category; Hello all, i have a problem with an 'if' statement alway's being true. This is what i'm working on... Code: ...

  1. #1
    Registered User loopy's Avatar
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    'if' 'alway's true.

    Hello all, i have a problem with an 'if' statement alway's being true. This is what i'm working on...

    Code:
    if (totalpoints > 150)  //when totalpoints exceed's 350, this need's to be false
    {
            printf("\n\n\nYou have earned %d points, you are at level 2\n\n\n", totalpoints);
            gl_c = 2;
    }
    else if (totalpoints > 350) 
    {	
            printf("\n\n\nYou have earned %d points, you are at level 3\n\n\n", totalpoints);
    	gl_c = 4;
    }
    I've seen some interesting 'if' and 'else if' statement's before, what can i look for to increase my knowledge of these statement's, boolean algebra?
    Any help would be much appreaciated.
    Thank's.
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  2. #2
    &TH of undefined behavior Fordy's Avatar
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    As all numbers over 350 are also more than 150, the second boolean expression will never work.......

    Try this..

    Code:
    if (totalpoints > 150 &&  totalpoints < 350)  //when totalpoints exceed's 350, this need's to be false
    {
            printf("\n\n\nYou have earned %d points, you are at level 2\n\n\n", totalpoints);
            gl_c = 2;
    }
    else if (totalpoints > 350)
    {
            printf("\n\n\nYou have earned %d points, you are at level 3\n\n\n", totalpoints);
    gl_c = 4;
    }

  3. #3
    Im back! shaik786's Avatar
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    Code:
    if (totalpoints > 150)  //when totalpoints exceed's 350, this need's to be false
    {
            printf("\n\n\nYou have earned %d points, you are at level 2\n\n\n", totalpoints);
            gl_c = 2;
    }
    else if (totalpoints > 350) 
    {	
            printf("\n\n\nYou have earned %d points, you are at level 3\n\n\n", totalpoints);
    	gl_c = 4;
    }
    Remove the 'else' part

    OR

    Code:
    if (totalpoints > 150 && totalpoints < 350)  //when totalpoints exceed's 350, this need's to be false
    {
            printf("\n\n\nYou have earned %d points, you are at level 2\n\n\n", totalpoints);
            gl_c = 2;
    }
    else if (totalpoints > 350) 
    {	
            printf("\n\n\nYou have earned %d points, you are at level 3\n\n\n", totalpoints);
    	gl_c = 4;
    }

  4. #4
    Registered User loopy's Avatar
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    Thank's alot, i'm not quite sure how you learned that, i guess i do a search for boolean expression and see what i come up with.
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  5. #5
    Me want cookie! Monster's Avatar
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    And what if totalpoints is 350 ???
    Code:
    if (totalpoints > 150 && totalpoints <= 350)  //when totalpoints exceed's 350, this need's to be false
    {
            printf("\n\n\nYou have earned %d points, you are at level 2\n\n\n", totalpoints);
            gl_c = 2;
    }
    else if (totalpoints > 350) 
    {	
            printf("\n\n\nYou have earned %d points, you are at level 3\n\n\n", totalpoints);
    	gl_c = 4;
    }

  6. #6
    ....
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    Or you could change the places of comparison.

    Code:
    /* totalpoints -> <350,...> */
    if (totalpoints > 350) 
    {
            printf("\n\n\nYou have earned %d points, you are at level 3\n\n\n", totalpoints);
    	gl_c = 4;
    }
    /* totalpoints -> <150,350] */
    else if (totalpoints > 150) 
    {	
            printf("\n\n\nYou have earned %d points, you are at level 2\n\n\n", totalpoints);
            gl_c = 2;
    }
    Last edited by Shiro; 06-18-2002 at 11:10 AM.

  7. #7
    Registered User loopy's Avatar
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    Anyone searching for more info on boolean expression's look here
    I got this site from google.
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