Check out example codes for "int main(int argc char *argv ) in c". It will help you in understanding the concepts better.

Code Example 1

// Name of program mainreturn.cpp 
#include <iostream> 
using namespace std; 
  
int main(int argc, char** argv) 
{ 
    cout << "You have entered " << argc 
         << " arguments:" << "\n"; 
  
    for (int i = 0; i < argc; ++i) 
        cout << argv[i] << "\n"; 
  
    return 0; 
}

Code Example 2

int  // Specifies that type of variable the function returns.
     // main() must return an integer
main ( int argc, char **argv ) {
     // code
     return 0; // Indicates that everything went well.
}

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