C++ program to search a given string in the file using command line arguments

C++ program to find a given word in the files file1.txt and file2.txt and display the number of occurrences of that word. Pass the arguments through command line.

#include<iostream>

#include<fstream>

using namespace std;

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

{

int occ=0;

char word[20];

int n=500;

char *a=new char[n];

int k=0,i=0,j=0;

cout<<"enter the word to be searched\n";

cin.getline(word,10);

int w_size=0;

for(int i=0;word[i]!='\0';i++)

{

w_size++;

}

ifstream fin[2];

for(int m=1,o=0;m<=2,o<=1;m++,o++)

{

fin[o].open(argv[m],ios::in);

if(fin[o].is_open())

{

cout<<"the file("<<argv[m]<<") opened successfully!!!\n";

while(!fin[o].eof() && k<n)

{

fin[o].get(a[k]);

k++;

}

a[k-1]='\0';

for(i=0;a[i]!='\0';i++)

{

for(j=0;word[j]!='\0';j++)

{

if(a[i]!=word[j])

{

break;

}

else

{

i++;

if(word[j+1]=='\0')

{

occ++;

}//if

}//else

}//for

}//for

if(occ==0)

{

cout<<"word do not exist!!\n";

}

}//if

else

{

cout<<"the file("<<argv[m]<<") could not be opened!!\n";

}

fin[o].close();

}

cout<<"total occurences found : "<<occ<<endl;

return 0;

}