Question

For C++, how do I read through a file called "dictionary.txt" and see if the word user-inputted is in the file, but using cstring only and NOT string.

For example,

if the dictionary.txt is like

Another

ostentatious

work

extra

dog

camera

hinder

the output should look like this,

Enter a word to be looked up in dictionary: cats

cats is NOT in the dictionary.

Enter a word to be looked up in dictionary: ostentatious

ostentatious IS in the dictionary.

Answer 1

#include<iostream>
#include<fstream>
#include<cstring>
using namespace std;
int main()
{
    ifstream infile;
    char str[20],temp[20];
    int i,opt;
    infile.open("dictionary.txt"); //open the file dictionary.txt
    if(!infile)
    {
        cout<<endl<<"Unable to open the file";
        return 0;
   }
    cout<<endl<<"Enter a word to be looked u in dictionary : ";
    cin>>temp; //read the word to lookup in dictionary
    //loop to read the file till end
    while(!infile.eof())
    {
       infile>>str;//read a word from file
       //compare the word with the word in file
       for(i=0;temp[i]!='\0';i++)
           if(temp[i]!=str[i])
               break;
       if(temp[i]=='\0' && str[i]=='\0')  
       {
           cout<<endl<<temp<<" is in the dictionary.";
           opt=1;
           break;
       }
   }
   if(opt!=1)
   {
       cout<<endl<<temp<<" is not in the dictionary.";
   }
    infile.close();//close the file
}

output