Thread: Simple C Program [for loops?]

  1. #1
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    Simple C Program [for loops?]

    Code:
    #include <stdlib.h>
    
    int main()
    {
    
         int i,total;
    
         for (i = 2; i<=31;i++)
         {
             if ( i%2 == 0) {
                printf("Number : %d \n",i);
                total += i;
                };
         };
    
         printf("Total : %d \n",total);
    
         system("PAUSE");
          return 0;
    }
    This is the way i coded my application however is it possible to do it without an if statement? by incrementing step 2? i tried

    for (i = 2; i<=31;i+2) but it just goes into an infinite loop displaying 2... what is wrong?

  2. #2
    Hurry Slowly vart's Avatar
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    1. total is not initialized
    2. i+2 does not change the value of i, use i += 2
    3. system("PAUSE"); - read forum in the last two days I saw a couple of advices agains usage of this function, I'm too lazy to repeate them.
    All problems in computer science can be solved by another level of indirection,
    except for the problem of too many layers of indirection.
    David J. Wheeler

  3. #3
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    thanks man

  4. #4
    Registered User ssharish2005's Avatar
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    just for the sake of perfection

    Code:
    #include<stdio.h>
    should be included

    ssharish2005

  5. #5
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    true

  6. #6
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    Initializing it when declaring it is a good habit
    e.g:

    int i = 0;
    int total = 0;

    And better one per line, because

    int * a,b;

    It means "int * a; int b;" instead of " int * a;int * b;"

    And I like this form:
    Code:
    if ( i%2 == 0) 
    {
        printf("Number : %d \n",i);
        total += i;
    };
    ^_~

  7. #7
    Frequently Quite Prolix dwks's Avatar
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    You don't really need semicolons after all of your if statements and for loops . . .
    dwk

    Seek and ye shall find. quaere et invenies.

    "Simplicity does not precede complexity, but follows it." -- Alan Perlis
    "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra
    "The only real mistake is the one from which we learn nothing." -- John Powell


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