help with the basic's

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  1. #1
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    Dec 2008
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    help with the basic's

    Howdy,

    I am just learning the c languge from Sam's Teach yourself C.
    I am on to Understanding Arrays, there is a question I had that was not answered in the book.

    The question was write a program to display the total memory space taken by the array(I understand this part), what I was wondering if you had a array of floating numbers to print the array out would I use a for loop or a while loop, because I cant figure out how to get it to work with a for loop, If i change i to a double or float it still wont work here is my code, And thank you all for your time and your suggestions.

    Code:
    #include <stdio.h>
    
    main() {
        
        double list_data[6] = {
                1.12345,
                2.12345,
                3.12345,
                4.12345,
                5.12345,
                6.12345};
                
        int i, size;
        size = sizeof(list_data);
        printf("The size of list_data is %d\n", size); 
            for (i=0; i<list_data[i]; i++) 
               printf(" %.5f\n", list_data[i]);
                   
            
                
        return (0);
    }
    Last edited by clb2003; 02-09-2009 at 06:07 AM.

  2. #2
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    So the normal structure for a for loop is:
    Code:
        for(i=0; i<ARRAY_SIZE; ++i)
    in your case array size is 6.

    Similarly to get the ith element in the array for printing, you use list_data[i]
    It is too clear and so it is hard to see.
    A dunce once searched for fire with a lighted lantern.
    Had he known what fire was,
    He could have cooked his rice much sooner.

  3. #3
    Registered User ralu.'s Avatar
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    Feb 2009
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    Bucharest, RO
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    32
    If you know how to use while loop than is simple to use a for loop instead of the while loop. The similarities between this 2 loop are this:
    *while loop:
    Code:
    int contor = 0;
    
    while(cnd) {
    /* do smthg */
    contor++;
    }
    *for loop:
    Code:
    int contor;
    
    for (contor = 0; cnd; contor++) {
    /* do smthg */
    }
    The 2 of them are equivalent.
    I have stopped reading Stephen King novels. Now I just read C code instead.

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