Welcome to Project Euler.

int x = 1,
    prev = 0,
    temp = 0;
for(int i = 0; i < 4; i++) {
    temp = x;
    x += prev;
    prev = temp;
    cout << x << " ";
}

The mathematical code playground. Solve problems.

What is Project Euler?

• 
  We provide mathematical problems of increasing difficulty for you to solve.
• 
  You think, research, and submit a solution. We tell you if your answer is correct.
• 
  Keep solving problems to challenge your mind and increase your logical and mathematical skills!