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Newbie trying to create a program in C language has run into an error can you help?

This is a discussion on Newbie trying to create a program in C language has run into an error can you help? within the C Programming forums, part of the General Programming Boards category; Code: #include <stdio.h> #include <conio.h> int main(void){ int stw; int weight; int total; stw=190; total=0; loopcount=0; while (loopcount<3){ printf("Hello Mickey, ...

  1. #1
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    Newbie trying to create a program in C language has run into an error can you help?

    Code:
    #include <stdio.h>
    #include <conio.h>
    
    int main(void){
        
        int stw;
        int weight;
        int total;
        stw=190;
        total=0;
        loopcount=0;
            while (loopcount<3){
               printf("Hello Mickey, what is your weight today?");
               scanf("%d", &weight);
               loopcount=loopcount+1;
    }
        
       
        total = stw - weight;
        printf("Total weight lost is %d", weight);
        scanf("%d", &total);
        getch();
        getch();
        
    }
    I get the error:
    `loopcount' undeclared (first use this function)
    (Each undeclared identifier is reported only once for each function it appears in.)

    Please help with this simple program if you can. Thank you.

  2. #2
    Registered User Inanna's Avatar
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    Have you tried declaring loopcount?
    pixypoxy likes this.

  3. #3
    Registered User claudiu's Avatar
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    Also, make sure you return 0 at the end of main.

    On a side note get rid of conio and all the obsolete crap DOS libraries, enter the 21st century and get an IDE more modern than Turbo C such as Codeblocks (my favourite), Pelles, etc.
    1. Get rid of gets(). Never ever ever use it again. Replace it with fgets() and use that instead.
    2. Get rid of void main and replace it with int main(void) and return 0 at the end of the function.
    3. Get rid of conio.h and other antiquated DOS crap headers.
    4. Don't cast the return value of malloc, even if you always always always make sure that stdlib.h is included.

  4. #4
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    This looks wrong:

    Code:
        total = stw - weight;
        printf("Total weight lost is %d", weight);
        scanf("%d", &total);
    1. the weight lost is total, not weight, right? (I'm assuming stw is "starting weight")
    2. What's the scanf call for? (i.e., why are you attempting to input something?)
    Last edited by mike65535; 06-07-2011 at 03:37 PM.

  5. #5
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    Quote Originally Posted by Inanna View Post
    Have you tried declaring loopcount?
    I am really really new...uh but I did finally get it and also thanx to Mike for helping me clear up the bottom.

  6. #6
    Registered User whiteflags's Avatar
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    You're recording weights in the loop, OP, but you're not doing anything with that information. For example, if someone weighs too much and wants to lose thirty pounds in three months, you record a weight each month and subtract each time to figure out how much they lost.
    pixypoxy likes this.

  7. #7
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    Quote Originally Posted by whiteflags View Post
    You're recording weights in the loop, OP, but you're not doing anything with that information. For example, if someone weighs too much and wants to lose thirty pounds in three months, you record a weight each month and subtract each time to figure out how much they lost.
    Thats the kind of programming that I would eventually like to do but for now I am starting off very slow. I was told C was the easiest language to learn to program with so here I am. I just got snafu'ed with the earlier problem and some other problems but now it seems to work...Maybe I can move on to more complex tasks now...Thanx for the help guys.

  8. #8
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    C is far from the easiest language to learn. It's not as bad as C++, but there are better languages.

    Furthermore, if you want to learn to program, you should use a modern object oriented language.
    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.

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