t = a; a = b; b = t; // t is a third integer variable (swap variable) But here's a way without a swap variable, given as as a macro in C: #define SWAP(a,b) { if (a!=b) { a^=b; b^=a; a^=b; }} // Swap macro by XOR Once you define it, you can say swap(x,y) to swap x and y. The numbers kind of flow through each other and end up swapped.
By using the algorithm of bitwise EORing (Exclusive ORing) the numbers together:If the two numbers are X and Y, then to swap them:X = X EOR YY = Y EOR XX =X EOR Ywill swap them.With knowledge of that algorithm, one then uses the syntax of Javascript to implement it.
A = A xor B B = A xor B A = A xor B in C... A^=B; B^=A; A^=B;
The bitwise XOR operator is ^, or shift 6. The bitwise XOR assignment operator is ^=.
a XOR b is a^b in C language
// Note: ^ is the XOR operator a = a ^ b b = b ^ a a = a ^ b
a := a XOR b b := a XOR b a := a XOR b it works, but never use it in real programs do you know why its not used in real program??
a=a^b; b=a^b; a=a^b;
t = a; a = b; b = t; // t is a third integer variable (swap variable) But here's a way without a swap variable, given as as a macro in C: #define SWAP(a,b) { if (a!=b) { a^=b; b^=a; a^=b; }} // Swap macro by XOR Once you define it, you can say swap(x,y) to swap x and y. The numbers kind of flow through each other and end up swapped.
There are two ways in which you can swap without a third variable. 1. Using xor operation swap( int *a, int *b) { *a = *a ^ *b; *b = *a ^ *b; *a = *a ^ *b; } 2. Using addition and subtraction swap( int *a, int *b) { *a = *a + *b; *b = *a - *b; *a = *a - *b; } }
swap (int *a, int *b) { *a ^= *b; *b ^= *a; *a ^= *b; }
3*xor- two input
void swap(int& a, int& b ) { a^=b^=a^=b; }
You cannot swap two numbers using call by value, because the called function does not have access to the original copy of the numbers.Swap with call by reference... This routine uses exclusive or swap without temporary variable.void swap (int *a, int *b) {*a ^= *b;*b ^= *a;*a ^= *b;return;}
No, XOR gate is a not a universal gate. There are basically two universal gates NAND and NOR.
By using the algorithm of bitwise EORing (Exclusive ORing) the numbers together:If the two numbers are X and Y, then to swap them:X = X EOR YY = Y EOR XX =X EOR Ywill swap them.With knowledge of that algorithm, one then uses the syntax of Javascript to implement it.
I don't know.the Switch-A-Roo? not,it's inverse.