syntax checker (ex 1 -24 ) (the c programming language book 2nd ed)

synchecker.c

#include <stdio.h>

void scanComment (int);
void scanBraces  ();
void scanParen   ();
void scanDquote  ();
void scanSquote  ();

int main ()
{
    int ch;

    while ( (ch = getchar ()) != EOF ) {
        if (ch == '/')
            scanComment(ch);

        if (ch == '{')
            scanBraces();

        if (ch == '(')
            scanParen();

        if (ch == '"')
            scanDquote ();

        if (ch == 39)
            scanSquote ();



    }




    return 0;
}

void scanComment(int c) {
    int ch = c;
    int ch3;

    if (ch == '/' && getchar () == '*') {
            while ( (ch3 = getchar ()) != EOF) {
                    if (ch3 == '*') {
                        if ( (ch3 = getchar ()) == '/');
                            return;
                    }

                    if (ch3 == ' ' && getchar () == '\n' ||
                        ch3 == '\n')
                        break;

            }

    }

    printf ("\nuncomplete comment");
}

void scanBraces() {
    int ch1;

    while ( (ch1 = getchar ()) != EOF) {
        if (ch1 == '}')
            return;

        if (ch1 == '(')
            scanParen ();

        if (ch1 == '"')
            scanDquote ();

        if (ch1 == 39)
            scanSquote ();

        if (ch1 == ' ' && getchar () == '\n' ||
                        ch1 == '\n')
                        break;

    }

    printf ("\nuncomplete braces");
}

void scanParen () {
    int ch1;

    while ( (ch1 = getchar ()) != EOF ) {
        if (ch1 == ')')
            return;

        if (ch1 == '"')
            scanDquote ();

        if (ch1 == 39)
            scanSquote ();

        if (ch1 == ' ' && ch1 == '\n' ||
            ch1 == '\n')
                break;

    }

    printf ("\nuncomplete parenthesis");

}

void scanDquote () {
    int ch1;

    while ( (ch1 = getchar ()) != EOF ) {
        if (ch1 == '"')
            return;

        if (ch1 == ' ' && ch1 == '\n' ||
            ch1 == '\n')
                break;
    }

    printf ("\nuncomplete double quote");
}

void scanSquote () {
    int ch1;
    int count = 0;

    while ( (ch1 = getchar ()) != EOF ) {

        if (ch1 == 39 && count == 1)
            return;

        ++count;

        if (ch1 == ' ' && ch1 == '\n' ||
            ch1 == '\n' || count > 1)
                break;


    }

    printf ("\nuncomplete single quote");
}