arithmetic without variables?

This is a discussion on arithmetic without variables? within the C Programming forums, part of the General Programming Boards category; I have been told to write a program which calculates total cost using values for amounts of resources and cost. ...

  1. #1
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    arithmetic without variables?

    I have been told to write a program which calculates total cost using values for amounts of resources and cost. I am supposed to write the program in functions, which I understand how to do although I am told I cannot use global variablesn and don't need to use local variables.

    But I don't understand how I can do the arithmetic without variables, and also how to pass the values between the functions without using global variables.

    I am new to programming so I am sorry for asking questions which are probably very basic, I have had a quick look through the FAQ's and tutorials but I still can't seem to find anything that would help me.

    Thanks

  2. #2
    CSharpener vart's Avatar
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    You should pass a values to the functions as parameters... And (seems strange to me) use only these parameters variables in your calculations
    The first 90% of a project takes 90% of the time,
    the last 10% takes the other 90% of the time.

  3. #3
    Registered User SpaceCadet's Avatar
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    Code:
    int calcDeficit(int x, int y)
    {
        return (x-y);
    }
    
    int main (void)
    {
        int MUFC_points=25;
        int LFC_points=14;
    
        int deficit=calcDeficit(MUFC_points, LFC_points);
    
        if (deficit > 10)
        {
            printf ("%d points behind. You're season is over Mickey!", deficit);
        }
        else
        {
            printf("Dream on mate, United are %d points ahead already. You know you can't catch them!", deficit);
        }
    }

    Enjoy. Know I did!
    All questions are easy. The answers cause the problem...

  4. #4
    Cat without Hat CornedBee's Avatar
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    Parameters are local variables. The instructions you got are factually incorrect. It is impossible to do anything useful without local variables when you're not allowed to use global variables.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

  5. #5
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    Pity C doesn't have lambda functions You could try argc and argv, but that'd be a stretch.
    Code:
    #include <stdio.h>
    
    void J(char*a){int f,i=0,c='1';for(;a[i]!='0';++i)if(i==81){
    puts(a);return;}for(;c<='9';++c){for(f=0;f<9;++f)if(a[i-i%27+i%9
    /3*3+f/3*9+f%3]==c||a[i%9+f*9]==c||a[i-i%9+f]==c)goto e;a[i]=c;J(a);a[i]
    ='0';e:;}}int main(int c,char**v){int t=0;if(c>1){for(;v[1][
    t];++t);if(t==81){J(v[1]);return 0;}}puts("sudoku [0-9]{81}");return 1;}

  6. #6
    Reverse Engineer maxorator's Avatar
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    Who are such teachers who give these STUPID assignments?

    They should be burned, because they are teaching stupid things...
    "The Internet treats censorship as damage and routes around it." - John Gilmore

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