Shell Programming and Scripting

awk 'END{print NR}' yourfile

gcc -Wall -o wcc wcc.c
# and then issue
./wcc yourfile

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


#define MAX 2048

int main(int argc, char** argv)
{
        char zbuf[MAX];
        long int z=0;
        FILE *fp;

        fp=fopen(argv[1],"r");
        if( !fp )
        {
                fprintf(stderr, "Error: File %s could not be opened.\n", argv[1]);
                exit (EXIT_FAILURE);
        }
        else
        {
                while ( fgets(zbuf, MAX, fp) )
                {
                        z++;
                }
        }
        fclose(fp);
        printf("Line count: %li\n", z);
        exit (EXIT_SUCCESS);
        return 0;
}

awk 'END{printf ("%d\n", NR)}' yourfile

# echo "10000000000000000000" | awk '{printf ("%d\n", $0)}'
10000000000000000000
# echo "100000000000000000000" | awk '{printf ("%d\n", $0)}'
1e+20