Count No of Lines, Blank Lines, Comments in a given Program

#include

#include

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

    int line_count = 0, n_o_c_l = 0, n_o_n_b_l = 0, n_o_b_l = 0, n_e_c = 0;

    FILE *fp1;

    char ch;

    fp1 = fopen(argv[1], "r");

    while ((ch = fgetc(fp1))! = EOF)

        if (ch  ==  '\n')

            line_count++;

        if (ch  ==  '\n')

            if ((ch = fgetc(fp1))  ==  '\n')

                fseek(fp1, -1, 1);

                n_o_b_l++;

        if (ch  ==  ';')

            if ((ch = fgetc(fp1))  ==  '\n')

                fseek(fp1, -1, 1);

                n_e_c++;

    fseek(fp1, 0, 0);

    while ((ch = fgetc(fp1))! = EOF)

        if (ch  ==  '/')

            if ((ch = fgetc(fp1))  ==  '/')

                n_o_c_l++;

    printf("Total no of lines: %d\n", line_count);

    printf("Total no of comment line: %d\n", n_o_c_l);

    printf("Total no of blank lines: %d\n", n_o_b_l);

    printf("Total no of non blank lines: %d\n", line_count-n_o_b_l);

    printf("Total no of lines end with semicolon: %d\n", n_e_c);

Output

Total no of lines: 204

Total no of comment line: 19

Total no of blank lines: 11

Total no of non blank lines: 193

Total no of lines end with semicolon: 66

Reverse the Contents of a File and Print it

#include

#include

#include

long count_characters(FILE *);

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

    int i;

    long cnt;

    char ch, ch1;

    FILE *fp1, *fp2;

    if (fp1 = fopen(argv[1], "r"))

        printf("The FILE has been opened...\n");

        fp2 = fopen(argv[2], "w");

        cnt = count_characters(fp1);

        fseek(fp1, -1L, 2);

        printf("Number of characters to be copied %d\n", ftell(fp1));

        while (cnt)

            ch = fgetc(fp1);

            fputc(ch, fp2);

            fseek(fp1, -2L, 1);

            cnt--;

        printf("\n**File copied successfully in reverse order**\n");

    else

        perror("Error occured\n");

    fclose(fp1);

    fclose(fp2);

long count_characters(FILE *f)

    fseek(f, -1L, 2);

    long last_pos = ftell(f);

    last_pos++;

    return last_pos;

Output

The function STRERROR returns a pointer to an ERROR MSG STRING whose contents are implementation defined.

THE STRING is not MODIFIABLE and maybe overwritten by a SUBSEQUENT Call to the STRERROR function.

The FILE has been opened..

Number of characters to be copied 203

**File copied successfully in reverse order**

.noitcnuf RORRERTS eht ot llaC TNEUQESBUS a yb nettirwrevo ebyam dna ELBAIFIDOM ton si GNIRTS EHT

.denifed noitatnemelpmi era stnetnoc esohw GNIRTS GSM RORRE na ot retniop a snruter RORRERTS noitcnuf ehT

The FILE has been opened..

Number of characters to be copied 203

**File copied successfully in reverse order**

The function STRERROR returns a pointer to an ERROR MSG STRING whose contents are implementation defined.

THE STRING is not MODIFIABLE and maybe overwritten by a SUBSEQUENT Call to the STRERROR function.