"Sword means offer" does not use the new variable, exchange the value of two variables, C + + implementation

# topics

Swaps the values of two variables without using a new variable.

# ideas

method One: use the Add and subtract operation to exchange the values of two variables.

A = A+b

B = a A

A = A-B

method Two: exchange values of two variables using XOR operation

A = A^b

B = A^b

A = A^b

# code

#include <iostream>using namespace std;void fun1 (int m,int n) {cout<<"method One, exchange two variables based on addition and subtraction"<<Endl; M= m +N; N= M-N; M= M-N; cout<<m<<"    "<<n<<Endl;} void fun2 (int m,int n) {cout<<"method Two, exchange two variables based on XOR operation"<<Endl; M= m^N; N= m^N; M= m^N; cout<<m<<"    "<<n<<Endl;} int main () {int M= 10; int n= 20; cout<<"Original Value"<<Endl; cout<<m<<"    "<<n<<Endl;    FUN1 (M,n);    Fun2 (M,n); return0;}

"Sword means offer" does not use the new variable, exchange the value of two variables, C + + implementation