would you please help me figure this simple c

[Nobody/Anonymous]

would you please explain why did the prof use
x[i-1]=atof(argv[i]) in this program.
and what does argc, and argv mean in this progaram. 

#include <iostream>
#include <stdlib.h>
double findSmallLarge(int , double *, double &);
double findSmallLarge(int np, double x[], double &big)
{
    double smallest = x[0];
    for (int i = 1; i < np; i++)
      
        if (smallest > x[i])
            smallest = x[i];
    big = x[0];
    for (int i = 1; i < np; i++)
        if (big < x[i])
            big = x[i];
    return smallest;
}

int main(int argc, char *argv[])
{
  double x[50];
  for (int i = 1; i < argc; i++)
    x[i-1] = atof(argv[i]);
  double smallest, biggest;
  smallest = findSmallLarge(argc - 1, x, biggest); 
  cout << smallest << "  " << biggest << endl;
  system("PAUSE");   
  return 0;
}

[Nobody/Anonymous]

About argc and argv:

if you go to dos and try to:
scandisk C: /parameter1 /parameter2
then
argc=4 and argv[0]=scandisk, argv[1]=c:, argv[2]=/parameter1, argv[3]=/parameter2

About the other part i dont know, cause i dont know c++ and looking through a ANSI C perspective, it seems all wrong :)

[Nobody/Anonymous]

thank you very much, that helped..........