Thread: k&r chapter 1 question

quick question, I am on my 4th book and i am compiling a few examples out of Chapter 1 but not getting correct results. The program is not counting lines. For example:

Code:

#include <stdio.h>


main()
{
    int c, n1;
    
    n1 = 0;
    while (( c = getchar()) != EOF)
        if ( c == '\n')
            ++n1;
    printf("%d\n", n1);
}

and also,...

Code:

#include <stdio.h>


/* count charcters in input; 1st version */


main()
{
    long nc;
    
    nc = 0;
    while (getchar() != EOF)
        ++nc;
    printf("%ld\n", nc);
}

I am compiling them using CLANG 6.0.0 on freebsd 11.2. They compile however am not giving me total char count...just another empty blank line. THANKS!

Besides your rather ancient style (leaving "int" off of main and not initializing variables when declaring them) I don't see anything wrong.

How exactly are you running the programs?

What are you entering into the program?

How are you signalling EOF?

This is what I entered:
test
it
big
time.

And this is the result after signalling EOF:
18

This is from the code in the second snippet.

well a quick google and I used "CTRL + D" seems to "signal EOF" now

Originally Posted by _jamie

quick question, I am on my 4th book and i am compiling a few examples out of Chapter 1 but not getting correct results. The program is not counting lines. For example:

[code]

Code:

#include <stdio.h>


/* count charcters in input; 1st version */


main()
{
    long nc;
    
    nc = 0;
    while (getchar() != EOF)
        ++nc;
    printf("%ld\n", nc);
}

I am compiling them using CLANG 6.0.0 on freebsd 11.2. They compile however am not giving me total char count...just another empty blank line. THANKS!

The program has no an exit condition (only Strg-C). But the result is correct:

1 + Wolf = 5
1 + Ente = 5
0 = 1
Result = 11

Code:

#include <stdio.h>
#include <stdlib.h>
  
/* count charcters in input; 1st version */
 int main(void)
{
  int c, char_number = 0; 
    
    do
    {
        c = getchar();
        char_number++;
    }while(c != '0');  //"0" for end of input
      
  printf("\nThat are in total %3d characters.\n", char_number);
    return(0);
}

this code was right out of the book, and never mentioned 'CTRL+D" to exit. Thanks Kernelpanic!