Question

in c++ what is an example of command line input parsing. Like a small program which is using the command line input to get the file name and will open that file and read the content from it. The program also has a function that will form an action on what is inside the text file.

Answer 1

#include<iostream>
#include<fstream>
#include<string>

using namespace std;

void print(string str[], int count){
for (int i = 0; i<count; i++){
      cout << str[i] << endl;
}
}

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

   ifstream fin(argv[1]);
   string str[200];

   if (!fin){
       cout << "Error in opening file\n";
       return 0;
   }
   int count = 0;
   while (getline(fin,str[count])){
      count++;
   }
   print(str, count);
}