grep_.cpp

#include<iostream>
#include<cstdio>
#include<string>
#include<cstring>

using namespace std;

int main()
{
 char fn[10] , pat[10] , temp[1000];
 FILE *fp;
 cout<<"\nenter file name:";
 cin>>fn;
 cout<<"\nEnter pattern to be searched:";
 cin>>pat;
 fp = fopen(fn,"r");
 while(!feof(fp)){
 fgets(temp,1000,fp);
 if(strstr(temp,pat))
 cout<<temp;
 }
 fclose(fp);
 return 0;
}