snake, C++ (vc++) - rextester

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//Microsoft (R) C/C++ Optimizing Compiler Version 19.00.23026 for x86

#include <iostream>
#include <cstdlib>
#include <ctime>
#include <Windows.h>

const int NROWS = 5, NCOLS = 10 ;
using snake_type = char[NROWS][NCOLS] ;

void print( const snake_type& snake )
{
    // move to COORD {0,0} (top left)
    ::SetConsoleCursorPosition( ::GetStdHandle(STD_OUTPUT_HANDLE), {0,0} );
    std::cout << '\n' ;

for( const auto& row : snake )
    {
        for( char c : row ) std::cout << c << ' ' ;
        std::cout << '\n' ;
    }
}

int main()
{
    std::srand( std::time(nullptr) ) ;

const char ASTERISK = '*' ;
    const char DOT = '.' ;

snake_type snake ;
    int curr_row = std::rand() % NROWS ;
    int curr_col = std::rand() % NCOLS ; ;

for( auto& row : snake ) for( char& c : row ) c = DOT ;
    snake[curr_row][curr_col] = ASTERISK ;
    print(snake) ;

// move north
    if( curr_row > 0 )
    {
        std::cout << "\npress enter to move north: " ;
        std::cin.get() ;

// snake[curr_row][curr_col] = DOT ;
        --curr_row ;
        snake[curr_row][curr_col] = ASTERISK ;
        print(snake) ;
    }

// move east
    if( curr_col < (NCOLS-1)  )
    {
        std::cout << "\npress enter to move east: " ;
        std::cin.get() ;

// snake[curr_row][curr_col] = DOT ;
        ++curr_col ;
        snake[curr_row][curr_col] = ASTERISK ;
        print(snake) ;
    }

// etc.
}

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Compilation time: 1.82 sec, absolute running time: 0.32 sec, absolute service time: 2,19 sec