Trying to compile simple c++ program in make

Question

I am having trouble with make. I installed all of the features that come with cygwin. When I type in make command it says:

make:***No targets specified and no makefile found. Stop.

This is really annoying as it's a very simple program. My make file (Makefile):

# This is a sample file.

all: lab1

lab1: lab1.o
 g++ -Wall lab1.o -o lab1

lab1.o: lab1.cpp
 g++ -Wall -c lab1.cpp -o lab1.o

my program (lab1.cpp):

// This is a sample file written.

#include <iostream>

using namespace std;

int main() {
  cout << "Welcome to CS-240!" << endl;
  return 0;
  }

Answer 1

The issue (fixed in the comments) was that there was a Makefile.mak in the directory but not an actual Makefile without an extension. Changing the name worked for the submitter.