In C++ Implement a simple version of the linux grep command in C++. grep - Looks through a file, line by line, trying to find a user-specified search term in the line. If a line has the word within it, the line is printed out, otherwise it is not. Use the system calls open(), getline(), close().  Requirements (examples run from. terminal) Your program grep is always passed a search term and zero or more files to grep through (thus, more than one is possible). It should go through each line and see if the search term is in it; if so, the line should be printed, and if not, the line should be skipped. [terminal]$ ./grep ! main.cpp main2.cpp cout << "Hello, World!"; cout << "Programming is great fun!"; The matching is case sensitive. Thus, if searching for world, lines with World will not match.  Lines can be arbitrarily long (that is, you may see many many characters before you encounter a newline character, \n). grep should work as expected even with very long lines. For this, you might want to look into the getline() library call. If grep is passed no command-line arguments, it should print "wgrep: searchterm [file ...]" (followed by a newline) and exit with status 1. [termianl]$ ./grep wgrep searchterm [file ...] If grep encounters a file that it cannot open, it should print "grep: cannot open file" (followed by a newline) and exit with status 1. [terminal]$ ./grep World main3.cpp wgrep: cannot open file In all other cases, grep should exit with return code 0. If a search term, but no file, is specified, grep should work, but instead of reading from a file, grep should read from standard input. [terminal$ ./grep World Hello World Hello World Programming is great fun! Programming for real world problems is complex! Programming makes the World go round Programming makes the World go round ^C For simplicity, if passed the empty string as a search string, grep can either match NO lines or match ALL lines, both are acceptable. Here is an example of returning everything. [terminal]$ ./grep "" main.cpp #include using namespace std; int main(){ cout << "Hello, World!"; return 0; } If a search term consists of multiple words, the grep should work as follows: [terminal]$ ./grep "Hello, World" main.cpp cout << "Hello, World!";

In C++

Implement a simple version of the linux grep command in C++. grep - Looks through a file, line by line, trying to find a user-specified search term in the line. If a line has the word within it, the line is printed out, otherwise it is not. Use the system calls open(), getline(), close(). 

Requirements (examples run from. terminal)

• Your program grep is always passed a search term and zero or more files to grep through (thus, more than one is possible). It should go through each line and see if the search term is in it; if so, the line should be printed, and if not, the line should be skipped.
  • [terminal]$ ./grep ! main.cpp main2.cpp
    
    cout << "Hello, World!";
    
    cout << "Programming is great fun!";
• The matching is case sensitive. Thus, if searching for world, lines with World will not match. 
• Lines can be arbitrarily long (that is, you may see many many characters before you encounter a newline character, \n). grep should work as expected even with very long lines. For this, you might want to look into the getline() library call.
• If grep is passed no command-line arguments, it should print "wgrep: searchterm [file ...]" (followed by a newline) and exit with status 1.
  • [termianl]$ ./grep
    
    wgrep searchterm [file ...]
• If grep encounters a file that it cannot open, it should print "grep: cannot open file" (followed by a newline) and exit with status 1.
  • [terminal]$ ./grep World main3.cpp
    
    wgrep: cannot open file
• In all other cases, grep should exit with return code 0.
• If a search term, but no file, is specified, grep should work, but instead of reading from a file, grep should read from standard input.
  • [terminal$ ./grep World
    
    Hello World
    
    Hello World
    
    Programming is great fun!
    
    Programming for real world problems is complex!
    
    Programming makes the World go round
    
    Programming makes the World go round
    
    ^C
• For simplicity, if passed the empty string as a search string, grep can either match NO lines or match ALL lines, both are acceptable. Here is an example of returning everything.
  • [terminal]$ ./grep "" main.cpp
    
    #include <iostream>
    
    using namespace std;
    
    int main(){
    
    cout << "Hello, World!";
    
    return 0;
    
    }
• If a search term consists of multiple words, the grep should work as follows:
  • [terminal]$ ./grep "Hello, World" main.cpp
    
    cout << "Hello, World!";