2. Complete the following program. This program determines the hidden password e

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 2. Complete the following program. This program determines the hidden  password encoded in the function pass. The password is at most made up of  some given k unique numerical digits. The length of the password is given  at runtime on the command line. The length of the password ,k, will be between  2 and 10 inclusively. Your program must determine the correct password in  10!/(10-k)! attempts in order to be evaluated as correct.  //------------------------------------------------------------------ // Header/Prototype for pass.o  #include <iostream> using namespace std;  int pass(char* a); // Compares the c_string a to its hidden c_string p. // If the same then returns the value 1 // Else returns the value 0  //-------------------------------------------------------------------  //------------------------------------------------------------------- // Simple Driver program to check user guess against password hidden in // pass.o (6.cpp)  #include <iostream> #include "pass.h" using namespace std;  int main(int argc, char* argv[]){         if(argc > 1) {                 if(pass(argv[1])== 0) cout << " Correct password  " << argv[1] << endl;                 else cout << "Incorrect password  ";         return 0;         }         return -1; }  /-------------------------------------------------------------------  Your job is to modify the file 6.cpp so that it finds the password  encoded in pass.o.  To link the object file pass.o to your 6.cpp program the following must  be  done.  Step 1: Compile your code (6.cpp) like so:          g++ -c 6.cpp  Step 2: Link the two object files together:         g++ pass.o 6.o  Step 3: ./a.out <integer>  Example1: For the test driver above (6.cpp), the following example could be  executed.  Input:          ./a.out 123457  Output:  Incorrect password  Example2:  Input:  ./a.out 123456   Output:  Correct password 123456

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