不使用乘法运算符
将数字乘以 10
给定一个数，任务是在不使用乘法运算符的情况下将其乘以 10？ 示例:
Input : n = 50
Output: 500
// multiplication of 50 with 10 is = 500
Input : n = 16
Output: 160
// multiplication of 16 with 10 is = 160
这个问题的一个简单解决方法是运行一个循环，将 n 与自身相加 10 次。这里我们需要执行 10 个操作。 一更好的解决办法就是用钻头操纵。我们必须将 n 乘以 10，即:n10，我们可以将其写成 n(2+8) = n2 + n8* 并且由于不允许使用乘法运算符，因此我们可以使用左移位按位运算符来实现。所以 n10 = n < < 1 + n < < 3。
C++
// C++ program to multiply a number with 10 using
// bitwise operators
#include<bits/stdc++.h>
using namespace std;
// Function to find multiplication of n with
// 10 without using multiplication operator
int multiplyTen(int n)
{
return (n<<1) + (n<<3);
}
// Driver program to run the case
int main()
{
int n = 50;
cout << multiplyTen(n);
return 0;
}
Java 语言(一种计算机语言，尤用于创建网站)
// Java Code to Multiply a number with 10
// without using multiplication operator
import java.util.*;
class GFG {
// Function to find multiplication of n
// with 10 without using multiplication
// operator
public static int multiplyTen(int n)
{
return (n << 1) + (n << 3);
}
/* Driver program to test above function */
public static void main(String[] args)
{
int n = 50;
System.out.println(multiplyTen(n));
}
}
// This code is contributed by Arnav Kr. Mandal.
Python 3
# Python 3 program to multiply a
# number with 10 using bitwise
# operators
# Function to find multiplication
# of n with 10 without using
# multiplication operator
def multiplyTen(n):
return (n << 1) + (n << 3)
# Driver program to run the case
n = 50
print (multiplyTen(n))
# This code is contributed by
# Smitha
C
// C# Code to Multiply a number with 10
// without using multiplication operator
using System;
class GFG {
// Function to find multiplication of n
// with 10 without using multiplication
// operator
public static int multiplyTen(int n)
{
return (n << 1) + (n << 3);
}
// Driver Code
public static void Main()
{
int n = 50;
Console.Write(multiplyTen(n));
}
}
// This code is contributed by Nitin Mittal.
服务器端编程语言（Professional Hypertext Preprocessor 的缩写）
<?php
// PHP program to multiply a
// number with 10 using
// bitwise operators
// Function to find multiplication
// of n with 10 without using
// multiplication operator
function multiplyTen($n)
{
return ($n << 1) + ($n << 3);
}
// Driver Code
$n = 50;
echo multiplyTen($n);
// This code is contributed by nitin mittal.
?>
java 描述语言
<script>
// JavaScript program to multiply a number with 10 using
// bitwise operators
// Function to find multiplication of n with
// 10 without using multiplication operator
function multiplyTen(n)
{
return (n<<1) + (n<<3);
}
// Driver program to run the case
let n = 50;
document.write(multiplyTen(n));
// This code is contributed by Surbhi Tyagi.
</script>
输出:
500
时间复杂度:0(1)
辅助空间:0(1)
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