OOP344 Week2 Environmental Variable Search and Display

// OOP344 Week2 Environmental Variable Search and Display -- Peter Huang
// Program finds a user entered environmental variable (case insensitive). It displays
// the variable and the value/path of the data.

#include <iostream>
#include <cstring>
using namespace std;

// #define DEBUG
#define usrMAX strlen(argv[1])
#define arrMAX strlen(env[arr])

int main(int argc, char* argv[], char* env[])
{
    int i;
    int j;
    int arr;
    int pos;
    int flag = 0;
    char usrSearch[usrMAX+1];

    strcpy(usrSearch,argv[1]); // copy search string to user search array

    char searchEnv[usrMAX+1];

    for(i = 0; env[i] && flag == 0; i++)
    {
         if(flag == 0) // loops and passes environmental variable string element, only to the length of user search array
         {
             for(j = 0; j < usrMAX; j++)
                searchEnv[j] = env[i][j];
             searchEnv[j] = '\0';

             if(stricmp(usrSearch,searchEnv) == 0) // index the env array and pos when user search and environmental name match (case insensitive)
             {
                 pos = j;
                 arr = i;
                 flag = 1;
             }
         }
    }

    if(flag == 1) // when match, finds which environmental index and the last pos (the actual data/path) and passes into a value array to output.
    {
        char searchVal[arrMAX];

        for(i = 0; i < arrMAX; i++)
        {
            if(env[arr][pos+i] != '\0')
              searchVal[i] = env[arr][pos+i];
        }
        searchVal[i] = '\0';

        cout << searchEnv << searchVal << endl;
    }
    else
        cout << "Not found" << endl;

#ifdef DEBUG // fardad's code for listing environmental variables
    for(i=0;env[i] != 0;i++){
        cout<<i<<": "<<env[i]<<endl;
    }
#endif

    return 0;
}