C ++中的数组字符串比较

Question

Basically what my code does is compare the words in keywords.txt file with the words in the keywords array and shows error suggestions based on whether the distance between these words is 1 or 2 and when these two words are not the same. * I am unable to figure out why it is still showing the suggestion for words that are the same * ? Any suggestions?

Below is my code

#include <iostream>
#include <fstream>
#include <string>
#include<vector>
using namespace std;

int EditDistance(string word1, string word2);

int main ()
{
    //keywords provided.
    string keywords[24] ={"auto","break","case","char","const","continue","default","do","double","else","enum","extern","float","for","goto","if","int","long","return","short","struct","switch","void","while"};
    int loop=0; //short for loop for input
    string line; //this will contain the data read from the file
    int numLines = 0;
    string unused;
    int result;
    ifstream myfile ("keywords.txt"); //opening the file.

    string arr[200];
     if (myfile.is_open()) //if the file is open
    {
        while (! myfile.eof() ) //while the end of file is NOT reached
        {
            getline (myfile,line); //get one line from the file

            arr[loop] = line;
          //  cout << arr[loop] << endl; //and output it
            loop++;
        }
        myfile.close(); //closing the file
    }
    else cout << "Unable to open file"; //if the file is not open output
  /*
    for(int i=0;i<24;i++)
    {
        for(int j=0;j<loop;j++)
        {
        if(arr[j]==keywords[i])
            cout<<arr[j]<<" and "<<keywords[i]<<" match. "<<endl;

        }
    }*/

    cout<<endl<<endl;
    cout<<"################## ERROR SUGGESTIONS ################"<<endl;
    cout<<"#                                                   "<<endl;
    cout<<"#                                                   "<<endl;

    for(int i=0;i<24;i++)
    {
            for(int j=0;j<loop;j++)
        {

            result=EditDistance(arr[j],keywords[i]);
            if (result==1 || result==2 && (arr[j]!=keywords[i]))    
            cout<<"# Use "<<keywords[i]<<" instead of " <<arr[j]<<" ? "<<endl;


        }
    }
    cout<<"#                                                   "<<endl;

    cout<<"#"<<endl;
    cout<<"#####################################################"<<endl;
    system("pause");
    return 0;
}

int EditDistance(string word1, string word2)  //function to find the distance between two words.
{
    int i, j, l1, l2, m;
    l1 = word1.length();
    l2 = word2.length();
    vector< vector<int> > t(l1 + 1, vector<int>(l2 + 1));

    for (i = 0; i <= l1; i++)
        t[i][0] = i;
    for (i = 1; i <= l2; i++)
        t[0][i] = i;

    for (i = 1; i <= l1; i++)
    {
        for (j = 1; j <= l2; j++)
        {
            m = min(t[i-1][j], t[i][j-1]) + 1;
            t[i][j] = min(m, t[i-1][j-1] + (word1[i-1] == word2[j-1] ? 0 : 1));
        }
    }
    return t[l1][l2];
}

Answer 1

On the line

if (result==1 || result==2 && (arr[j]!=keywords[i]))    

You probably mean

if( (result==1 || result==2 ) && arr[j]!=keywords[i])    

The first version is the same as

if (result==1 || (result==2 && arr[j]!=keywords[i]))   

So you will output if the result is 1 even if the word is correct. Which is not what you want.