generating program statistics

hi,

Im trying a program which reads in the source of a C program from its standard input and prints out the following statistics for the program (all as integers)

total number of lines
total number of blank lines
total number of characters
total number of spaces

Suggestions plz anyone?

You need fgets, a couple of functions out of the ctype.h library and a loop or two.

Go forth and code!

I've done this code but still can't find a way of counting the total number of blank lines.

Code:

main()
{
clrscr();
FILE *fp;
char ch;
int nol=0,not=0,nob=0,noc=0;

fp=fopen("filename.cpp","r");

while(1)
{
ch=fgetc(fp);

if(ch==EOF)
break;

noc++;

if(ch==' ')
nob++;

if(ch=='\n')
nol++;

if(ch=='\t')
not++;
}

fclose(fp);
noc=noc-nob;
printf("\nNumber of characters = %d",noc);
printf("\nNumber of blanks = %d",nob);
printf("\nNumber of tabs = %d",not);
printf("\nNumber of lines = %d",nol);
getch();
}

if i'm not mistaken, two consecutive newline characters is a blank line.

Originally Posted by peterchen

if i'm not mistaken, two consecutive newline characters is a blank line.

That depends on what you consider a blank line.

Code:

Here is a line.
    
Here is another line.

One might say there is a blank line separating those two statements, but there isn't by your standards. So to be more specific... two newlines with white space or nothing in between them.

This is more what I was thinking about. Though, it will suffer from the small bug that sly mentioned above.

Code:

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{

    FILE *fp;
    char buf[BUFSIZ];
    char ch;
    int nol = 0, not = 0, nob = 0, noc = 0, no_empty = 0;
    int i;
    
    if ( (fp = fopen("filename.cpp", "r")) == NULL )
    {
         printf("Could not open file for reading.\n\n");
         exit(1);
    }
    
    while ( (fgets( buf, BUFSIZ, fp) != '\0') )
    {
          
          for ( i = 0; (ch = buf[i]) != '\0'; i++ )
          {
                if ( i == 0 && ch == '\n' )
                {
                     nol++;
                     noc++;
                     no_empty++;
                     break;
                }
                
                switch ( ch )
                {
                       case ' ':
                            nob++;
                            noc++;
                            break;
                       case '\n':
                            nol++;
                            noc++;
                            break;
                       case '\t':
                            not++;
                            noc++;
                            break;
                       default:
                            noc++;
                }
          }
    }
    
    printf("No. of chars: %d\n", noc);
    printf("No. of spaces: %d\n", nob);
    printf("No. of lines: %d\n", nol);
    printf("No. of tabs: %d\n", not);
    printf("No. of blank lines: %d\n", no_empty);
    
    system("PAUSE");	
    return 0;
}

bivhitscar, thanks a lot its working fine now

> fgets( buf, BUFSIZ, fp) != '\0'
Should be != NULL
'\0' implies the nul character
NULL implies the NULL pointer.
The compiler will ultimately do the right thing, but it sends the wrong impression to the reader.

Bugger; thanks salem. The first time I wrote it out, it came out as NULL - but for some reason I thought it was wrong and changed it.

Originally Posted by peterchen

if i'm not mistaken, two consecutive newline characters is a blank line.

And gcc throws warnings is a source file doesn't end in a blank line. And according to your definition, that last line won't get counted. Take this file end: "#endif\n" (Then EOF) There is a final blank line, but no consecutive \n's since it's the last line.

Read in a line at a time, and if it contains nothing or spaces, tabs, \n, etc - depending on what you consider blank - then it's blank.

Edit: All the code so far seems to be one line off.