OOP344 Week 2 - Environment Variable Content Search Program

#include <cstring>
#include <iostream>
using namespace std;
#define MAX 50

int main( int argc, char* argv[], char* env[]){
 char searchStr[MAX + 1];
 char envSubStr[MAX + 1]; 
 int key = -1;
 int i;
 int searchStrLen;
 char* envContent = NULL;

 if (argc == 2){ 
  //make a copy of first argument passed and append an = sign
  strcpy (searchStr, argv[1]);
  strcat (searchStr, "=");
  
  searchStrLen = strlen (searchStr);
  searchStr [searchStrLen] = '\0';
  //binary search
  for (i = 0; env[i] && key == -1; i++){
   strncpy (envSubStr, env[i],searchStrLen + 1);
   envSubStr[searchStrLen] = '\0';
   if ( strcmp (envSubStr, searchStr) == 0){   
    key = i;   
   }  
  } 
 }
 
 if (key != -1){
  envContent = env[key] + searchStrLen;
  cout << envContent << endl;
 }
 else {
  cout << "Not found" << endl; 
 } 
}