算法题（如何用一个数字替换另一个数字（））

本文概述

C ++
Java
Python3
C#
的PHP

给定数字x和两位数字d1和d2, 将x中的d1替换为d2。
【算法题（如何用一个数字替换另一个数字（））】例子：

Input : x = 645, d1 = 6, d2 = 5 Output : 545 We replace digit 6 with 5 in number 645.Input: x = 746, d1 = 7, d2 = 8 Output : 846

我们遍历x的所有数字。对于每个数字, 我们检查它是否为d1, 我们相应地更新结果。
C ++

//CPP program to replace a digit with other //in a given number. #include < bits/stdc++.h> using namespace std; int replaceDigit( int x, int d1, int d2) { int result = 0, multiply = 1; while (x /10> 0) { //Take remainder of number starting from //the unit place digit int remainder = x % 10; //check whether it is equal to the digit //to be replaced.if yes then replace if (remainder == d1) result = result + d2 * multiply; else //else remain as such result = result + remainder * multiply; //Update and move forward from unit place //to hundred place and so on. multiply *= 10; x = x /10; //update the value } //check whether it is equal to the digit //to be replaced.if yes then replace if (x == d1) result = result + d2 * multiply; else //else remain as such result = result + x * multiply; return result; } //Driver code int main() { int x = 645, d1 = 6, d2 = 5; cout < < replaceDigit(x, d1, d2) < < endl; return 0; }

Java

//Java program to replace a digit //with other in a given number. class GFG { static int replaceDigit( int x, int d1, int d2) { int result = 0 , multiply = 1 ; while (x /10> 0 ) { //Take remainder of number //starting from the unit //place digit int remainder = x % 10 ; //check whether it is equal //to the digit to be replaced. //if yes then replace if (remainder == d1) result = result + d2 * multiply; else //else remain as such result = result + remainder * multiply; //Update and move forward //from unit place to //hundred place and so on. multiply *= 10 ; x = x /10 ; //update the value } //check whether it is equal to the digit //to be replaced.if yes then replace if (x == d1) result = result + d2 * multiply; else //else remain as such result = result + x * multiply; return result; } //Driver code public static void main(String[] args) { int x = 645 , d1 = 6 , d2 = 5 ; System.out.println(replaceDigit(x, d1, d2)); } } //This Code is Contributed by mits

Python3

# Python3 program to replace # a digit with other # in a given number. def replaceDigit(x, d1, d2): result = 0 multiply = 1 while (x //10> 0 ): # Take remainder of number # starting from the unit # place digit remainder = x % 10 # check whether it is # equal to the digit # to be replaced.if yes # then replace if (remainder = = d1): result = (result + d2 * multiply) else :# else remain as such result = (result + remainder * multiply) # Update and move forward # from unit place to hundred # place and so on. multiply * = 10 x = int (x /10 )# update the value # check whether it is equal to the digit # to be replaced.if yes then replace if (x = = d1): result = result + d2 * multiply else :# else remain as such result = result + x * multiply return result # Driver code x = 645 d1 = 6 d2 = 5 print (replaceDigit(x, d1, d2)) # This Code is contributed # by mits

//C# program to replace a digit //with other in a given number using System; class GFG { static int replaceDigit( int x, int d1, int d2) { int result = 0, multiply = 1; while (x /10> 0) { //Take remainder of number //starting from the unit //place digit int remainder = x % 10; //check whether it is equal //to the digit to be replaced. //if yes then replace if (remainder == d1) result = result + d2 * multiply; else //else remain as such result = result + remainder * multiply; //Update and move forward //from unit place to //hundred place and so on. multiply *= 10; x = x /10; //update the value } //check whether it is equal to the digit //to be replaced.if yes then replace if (x == d1) result = result + d2 * multiply; else //else remain as such result = result + x * multiply; return result; } //Driver code public static void Main() { int x = 645, d1 = 6, d2 = 5; Console.WriteLine(replaceDigit(x, d1, d2)); } } //This Code is contributed //by inder_verma

的PHP

< ?php //PHP program to replace //a digit with other //in a given number. function replaceDigit( $x , $d1 , $d2 ) { $result = 0; $multiply = 1; while ( $x /10> 0) { //Take remainder of number //starting from the unit //place digit $remainder = $x % 10; //check whether it is //equal to the digit //to be replaced.if yes //then replace if ( $remainder == $d1 ) $result = $result + $d2 * $multiply ; else //else remain as such $result = $result + $remainder * $multiply ; //Update and move forward //from unit place to hundred //place and so on. $multiply *= 10; $x = $x /10; //update the value }//check whether it is equal to the digit //to be replaced.if yes then replace if ( $x == $d1 ) $result = $result + $d2 * $multiply ; else //else remain as such $result = $result + $x * $multiply ; return $result ; } //Driver code $x = 645; $d1 = 6; $d2 = 5; echo replaceDigit( $x , $d1 , $d2 ); //This Code is contributed //by inder_verma ?>

输出如下：