Example of how php achieves Russian Multiplication

This article mainly introduces php's implementation of Russian multiplication. The example analyzes the principle and code implementation skills of Russian multiplication and has some reference value. If you need it, you can refer to it.

This article mainly introduces php's implementation of Russian multiplication. The example analyzes the principle and code implementation skills of Russian multiplication and has some reference value. If you need it, you can refer to it.

This example describes how php implements Russian multiplication. Share it with you for your reference. The specific analysis is as follows:

I. Overview:

Russian multiplication is an algorithm used to calculate the multiplication of two numbers.
Example:
Computing 35*72
Process
35 72
17 144
8 288
4 576
2 1152
1 2304
For each row from top to bottom, if the number on the left is an odd number, the number on the right is taken out and accumulated.
72 + 144 + 2304 = 2520
The accumulated result 2520 is the product.

II. Implementation Code:

<? Phpfunction russian ($ m, $ n, $ res = 0) {(1 = ($ n & 1) & $ res + = $ m; $ m = $ m <1; $ n = $ n> 1; return $ n? Russian ($ m, $ n, $ res): $ res;} echo russian (7, 8 );

I hope this article will help you with php programming.