Following on from this thread I thought it would be fun to waste some of my day (last day of holidays) to write a ‘random’ number generator for your lottery numbers.
Rather than supply a link to an executable I thought it easier to provide the source code so you can easily build it on yourself on your PC.
Source Code:
int main(int argc, char * argv[])
{
std::random_device rd ;
std::mt19937 engine{ rd() } ;
std::vector< unsigned > machine ;
std::list< unsigned > results ;
// See if a number's been passed on the CLI
int times = argc == 2 ? std::min(std::stoi(argv[1]), 7) : 1 ;
// Randomise the values in the vector
for (int n(0); n < times; n++) {
std::srand ( unsigned ( std::time(0) ) ) ;
// Fill vector with values in range
for (int i= 1; i < 59; ++i) machine.push_back(i) ;
// Randomise the content of the vector
std::random_shuffle (machine.begin(), machine.end(), [](unsigned i) { return std::rand() % i ;} ) ;
// Start the output
std::cout << "Line # " << std::setw(2) << (n + 1) << " : " ;
// Draw the numbers needed
for (int i(0); i < 6; i++) {
// Get a randomly generated int within the range of the vector size
std::uniform_int_distribution< int > dist(0, machine.size() -1 ) ;
int pos = dist(engine) ;
// Push the selected value into the list
results.push_back(machine[pos]) ;
// Remove the value from the vector
machine.erase(machine.begin() + pos) ;
}
machine.clear() ;
// Sort the selection in ascending order
results.sort() ;
// Write the results to the console
for (std::list< unsigned >::const_iterator ci = results.begin(); ci != results.end(); ++ci) {
std::cout << std::setw(2) << (*ci) << " " ;
}
std::cout << std::endl << std::flush ;
results.clear() ;
// Remove the comment from the line below if you want a delay between lines
//std::this_thread::sleep_for(std::chrono::milliseconds(50)) ;
}
std::cout << "Press Enter or Return to Exit" ;
std::cin.get();
return 0 ;
}
Mac / Linux Makefile:
CC = g++
CFLAGS = -Wall -O2 -std=c++14 -DNDEBUG
TARGET = lotto
INC = ./
SOURCES = main.cpp
OBJECTS = $(SOURCES:.cpp=.o)
all: $(TARGET)
$(TARGET): $(OBJECTS)
$(CC) $(CFLAGS) $(OBJECTS) -o $(TARGET)
main.o: main.cpp
$(CC) $(CFLAGS) -c main.cpp -I$(INC)
The make file is for Mac or Linux and will just work assuming you have build essentials installed. For Windows I’m afraid you’d need to create your own makefile or Visual Studio project. But if you do please feel free to post it for others.
Edit:- Add expected output:
iMac:Lottery Mook$ ./lotto 7
Line # 1 : 3 7 15 22 30 34
Line # 2 : 21 26 30 43 56 58
Line # 3 : 9 19 27 43 47 58
Line # 4 : 1 7 12 24 51 53
Line # 5 : 10 19 21 36 47 52
Line # 6 : 8 30 40 42 48 58
Line # 7 : 19 22 27 33 40 47
Press Enter or Return to Exit
