Comparing fractions X00639

Statement

Write a function

    bool c_frac(int n1, int d1, int n2, int d2);

that returns true whenever the fraction $\frac{n1}{d1}$ is strictly smaller than the fraction $\frac{n2}{d2}$ .

Precondition

@d1@, @d2@ $> 0$ .

Observation

You only need to submit the required procedure; your main program will be ignored.

Public test cases

Input/Output

c_frac(0, 3, 0, 3) → no
c_frac(1, 7, 2, 7) → yes
c_frac(2, 7, 1, 7) → no
c_frac(-1, 7, 2, 7) → yes
c_frac(2, 7, -1, 7) → no
c_frac(-630, 723, 510, 423) → yes

Information

Author: Maria Serna
Language: English
Translator: Maria Serna
Original language: Catalan
Other languages: Catalan Spanish
Official solutions: C++
User solutions: C++