No errors, but code not running
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Thread: No errors, but code not running

  1. #1
    Join Date
    May 2011
    Posts
    3

    Angry No errors, but code not running

    #include <iostream>
    #include <fstream>
    #include <stdlib.h>
    #include <string.h>
    #include "definitions.h"
    #include "system-utilities.h"
    #include <string>
    using namespace std;

    class specialTokenElement {

    public: char * sptok;
    int tokrep;
    specialTokenElement(char *sptok, int tokrep);
    };

    // File level variables. These are used on successive function calls and therefore
    // cannot be local variables.

    ifstream infile; // The input file itself
    char line[MAX_LINE_LENGTH]; // Holds characters on one line up to limit
    int lineLength=0; // Number of characters on the current line
    int currentPosition=1; // Current position on the line, ie the last position
    // used in the last token
    char textLine[1000]; // Collects the string for a text tag.
    char *spectoklist[NUMBER_OF_SPECIAL_TOKENS*2][2];
    int splistsz = 0;

    int openInputFile(char fname[]) {

    infile.open(fname, ios::in);
    if(infile.eof()) cout << "End of file.\n";
    if(!infile.is_open()) return FILE_NOT_OPENED;
    //if(infile) return FILE_NOT_OPENED;
    else return 0;
    }

    void printError(int errcode)
    {
    switch (errcode)
    {
    case 201:
    cout<<"End of file :"<<errcode<<"\n";
    break;
    case 202:
    cout<<"File not opened:"<<errcode<<"\n";
    break;
    case 301:
    cout<<"Token not found:"<<errcode<<"\n";
    break;
    case 255:
    cout<<"Max line length:"<<errcode<<"\n";
    break;
    default:
    cout<<"An unknown error has occured:"<<errcode<<"\n";
    }


    }//system-utilities.cpp

    int getNextToken(char **token) {
    int tmpPos; // Searches through the characters on the input line.
    int endPos; // Marks the end (last character) of the token.
    char ch; // The character in the line being searched as terminator.
    int tLen; // The number of characters in the token.
    int quotedToken; // Tells whether the token is a quoted token or not.


    // Find non_blank character. If we reach the end of the line, try to read
    // another line and start at the beginning again.
    tmpPos = currentPosition;
    do {
    tmpPos += 1;
    if(tmpPos>=lineLength) {
    if(infile.eof()) {
    printError(END_OF_FILE);
    return TOKEN_NOT_FOUND;
    }
    memset(line,0,sizeof(line));
    infile.getline(line,sizeof(line));
    lineLength = strlen(line);
    currentPosition = 0;
    tmpPos = 0;
    }
    } while(line[tmpPos]==' ');

    quotedToken = 0;

    // Check first for special cases - <, </, >, />, and =. If none of these,
    // its either a simple string or a quoted token.
    if(line[tmpPos]=='<') {
    if(line[tmpPos+1]=='/') endPos = tmpPos+1;
    else endPos = tmpPos;
    }
    else if((line[tmpPos]=='/') && (line[tmpPos+1]=='>')) {
    endPos = tmpPos+1;
    }
    else if(line[tmpPos]=='>') {
    endPos = tmpPos;
    }
    else if(line[tmpPos]=='=') {
    endPos = tmpPos;
    }
    else {
    // Not a special token. Check for starting with quote mark or not.
    if(line[tmpPos]=='"') {
    // Quoted token. Scan for next quote mark. Remember that token
    // starts at the character AFTER the initial quote mark, and the
    // terminating quote mark is not part of the token either.
    quotedToken = 1;
    tmpPos += 1;
    endPos = tmpPos+1;
    while(line[endPos]!='"') endPos++;
    endPos--;
    }
    else {
    // Non-quoted token. Scan for a blank, >, /, =, or end of line.
    endPos = tmpPos+1; ch = line[endPos];
    while( (ch!='>') && (ch!='/') && (ch!=' ') && (ch!='=') && (ch!=0) )
    ch = line[++endPos];
    endPos--;
    }
    }

    // Now copy the token out and reset currentPosition for next time.
    tLen = endPos-tmpPos+1;
    * token = (char *) malloc(tLen+1);
    memcpy(*token,line+tmpPos,tLen); // Copy the characters
    (*token)[tLen] = 0; // Add the string terminator 0.
    if(quotedToken) currentPosition = endPos+1;
    else currentPosition = endPos;

    cout<<token[0]<<"\n";


    return 0; // Indicate token successfully found.

    }

    void specialTokenElement(char *sptok, int tokrep){
    spectoklist[splistsz][0] = sptok; spectoklist[splistsz][1] = (char*) tokrep;
    splistsz+=1;
    cout<<spectoklist[splistsz][0]<<"|"<<spectoklist[splistsz][1];
    }
    void fillSpecialTokenList(){

    specialTokenElement("<", LEFT_ANGLE);
    specialTokenElement("</", LEFT_ANGLE_SLASH);
    specialTokenElement(">", RIGHT_ANGLE);
    specialTokenElement("/>", RIGHT_ANGLE_SLASH);
    specialTokenElement("=", EQUAL);
    specialTokenElement("document", DOCUMENT);
    specialTokenElement("link", LINK);
    specialTokenElement("image", IMAGE);
    specialTokenElement("section", SECTION);
    specialTokenElement("text", TEXT);
    specialTokenElement("new_line", NEW_LINE);
    specialTokenElement("report", REPORT);
    specialTokenElement("done", DONE);
    specialTokenElement("br", BR);
    }

    int getTokenNumber(char *s){
    for (int i=0; i<=splistsz;i++){
    if(strcmp(spectoklist[i][0],s)==0)
    { return (int)spectoklist[i][1];}
    else{return (int)UNRECOGNIZED_TOKEN;}
    }
    }




    //Main.cpp

    #include <iostream>
    #include <fstream>
    #include "definitions.h"
    #include "system-utilities.h"
    #include <string>
    using namespace std;


    int main()
    {
    int fileStatus = openInputFile("p5inputa.txt");
    char *tk="";
    if(fileStatus==0)
    {
    fillSpecialTokenList();
    while(int a = 1){
    char nxttk = getNextToken(&tk);
    if(nxttk != 0) printError(nxttk);break;
    int gtn = getTokenNumber(tk);
    if (gtn != (int)LEFT_ANGLE && gtn != (int)LEFT_ANGLE_SLASH) printError(UNEXPECTED_TAG);
    else if (LEFT_ANGLE){
    char nxttk = getNextToken(&tk);
    if(nxttk != 0) printError(nxttk);break;
    int gtn = getTokenNumber(tk);

    switch(tk[0]){
    case DOCUMENT:
    cout<<"Document tag recognized\n";
    break;
    case SECTION:
    cout<<"Section tag recognized\n";
    break;
    case IMAGE:
    cout<<"Image tag recognized\n";
    break;
    case LINK:
    cout<<"Link tag recognized\n";
    break;
    case TEXT:
    cout<<"Text tag recognized\n";
    break;
    case BR:
    cout<<"BR tag recognized";
    break;
    case REPORT:
    cout<<"Report tag recognized\n";
    break;
    case DONE:
    cout<<"Done tag recognized\n";
    break;
    default:
    printError(IMPROPER_TAG_TYPE);
    }
    }
    else if (LEFT_ANGLE_SLASH){

    char nxttk = getNextToken(&tk);
    if(nxttk != 0) printError(nxttk);break;
    int gtn = getTokenNumber(tk);

    switch(tk[0]){
    case DOCUMENT:
    cout<<"Document tag recognized";
    break;
    case SECTION:
    cout<<"Section tag recognized";
    break;
    case LINK:
    cout<<"Link tag recognized";
    break;
    case TEXT:
    cout<<"Text tag recognized";
    break;
    default:
    printError(IMPROPER_TAG_TYPE);
    }
    } else{}
    }
    }
    else
    {
    printError(fileStatus);
    }

    system ("PAUSE");
    return 0;}

  2. #2
    VictorN's Avatar
    VictorN is offline Super Moderator Power Poster
    Join Date
    Jan 2003
    Location
    Wallisellen (ZH), Switzerland
    Posts
    17,604

    Re: No errors, but code not running

    1. Define "not running".
    2. Please, use Code tags and indentations. See Announcement: Before you post....
    Victor Nijegorodov

  3. #3
    Join Date
    May 2011
    Posts
    3

    Re: No errors, but code not running

    I narrowed down the problem to this function:
    Given:

    #define NUMBER_OF_SPECIAL_TOKENS 13

    char *spectoklist[NUMBER_OF_SPECIAL_TOKENS*2][2];
    int splistsz = 0;

    void specialTokenElement(char *sptok, int tokrep){
    spectoklist[splistsz][0] = sptok; spectoklist[splistsz][1] = (char*) tokrep;
    splistsz+=1;
    cout<<spectoklist[splistsz][0]<<"|"<<spectoklist[splistsz][1];
    }

  4. #4
    VictorN's Avatar
    VictorN is offline Super Moderator Power Poster
    Join Date
    Jan 2003
    Location
    Wallisellen (ZH), Switzerland
    Posts
    17,604

    Re: No errors, but code not running

    Quote Originally Posted by VictorN View Post
    1. Define "not running".
    2. Please, use Code tags and indentations. See Announcement: Before you post....
    Quote Originally Posted by lucmicky View Post
    I narrowed down the problem to this function:
    Given:

    #define NUMBER_OF_SPECIAL_TOKENS 13

    char *spectoklist[NUMBER_OF_SPECIAL_TOKENS*2][2];
    int splistsz = 0;

    void specialTokenElement(char *sptok, int tokrep){
    spectoklist[splistsz][0] = sptok; spectoklist[splistsz][1] = (char*) tokrep;
    splistsz+=1;
    cout<<spectoklist[splistsz][0]<<"|"<<spectoklist[splistsz][1];
    }
    And? ...
    Victor Nijegorodov

  5. #5
    Join Date
    May 2011
    Posts
    3

    Re: No errors, but code not running

    I got it to work..i had to put (char *) before spectoklist[splistsz][1]
    Thanks

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