You can swap two integers without temporary storage by bitwise exclusive-or'ing them in a specific sequence...
a ^= b;
b ^= a;
a ^= b;
#include<iostream> template<typename _Ty>void swap (_Ty& a, _Ty& b) { _Ty temp = a; a = b; b = temp; } int main() { int x = 42; int y = 0; std::cout << "Before swap:" << std::endl; std::cout << "x = " << x << ", y = " << y << std::endl; swap (x, y); std::cout << "After swap:" << std::endl; std::cout << "x = " << x << ", y = " << y << std::endl; } Example Output Before swap: x = 42, y = 0 After swap: x = 0, y = 42
You can either insert one list directly into the other, or you can create a completely new list and insert the two lists one after the other. Neither method requires a temporary variable. Temporaries are only required when you need to swap one list for another, but you can minimise this requirement by using "move semantics", where the lists can simply swap their resources, not the elements themselves. In this way, only one temporary is required.
There are three primary algorithms to exchange the values of two variables. Exchange with Temporary Variable temp = a; a = b; b = temp; Exchange Without Temporary Variable Using Exclusive Or a = a ^ b; b = b ^ a; a = a ^ b; Exchange Without Temporary Variable Using Arithmetic a = a + b; b = b - a; a = a - b;
The only way to swap two values using call by value semantics is to pass pointer variables by value. A pointer is a variable that stores an address. Passing a pointer by value copies the address, the value of the pointer, not the pointer itself. By passing the addresses of the two values to be swapped, you are effectively passing those values by reference. Both C and C++ use pass by value semantics by default, however C++ also has a reference data type to support native pass by reference semantics. By contrast, Java uses pass by reference semantics by default. In C, to swap two variables using pass by value: void swap (int* p, int* q) { int t = *p; *p = *q; *q = t; } In C++, to swap two variables using pass by reference: void swap (int& p, int& q) { std::swap (p, q); } Note that C++ is more efficient because std::swap uses move semantics; there is no temporary variable required to move variables. With copy semantics, a temporary is required. However, with primitive data types, there is a way to swap values without using a temporary, using a chain of exclusive-or assignments: void swap (int* p, int* q) { *p^=*q^=*p^=*q; }
a ^= b; b ^= a; a ^= b;
To swap two variables without using a third variable, use exclusive or manipulation... a ^= b; b ^= a; a ^= b;
To swap two integers in a program, you can use a temporary variable. Here's a simple example in Python: a = 5 b = 10 temp = a a = b b = temp Alternatively, you can swap them without a temporary variable using tuple unpacking: a, b = b, a Both methods will effectively swap the values of a and 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;}
swap chip
bubble_sort (int N, int *A) { int i; swap = 1; while (swap) { swap = 0; for (i=0; i<N-1; ++i) { if (A[i] > A[i+1]) { swap = 1; A[i] ^= A[i+1]; A[i+1] ^= A[i]; A[i] ^= A[i+1]; } } } }
Yes
void swap(int& a, int& b ) { a^=b^=a^=b; }
#include<iostream> template<typename _Ty>void swap (_Ty& a, _Ty& b) { _Ty temp = a; a = b; b = temp; } int main() { int x = 42; int y = 0; std::cout << "Before swap:" << std::endl; std::cout << "x = " << x << ", y = " << y << std::endl; swap (x, y); std::cout << "After swap:" << std::endl; std::cout << "x = " << x << ", y = " << y << std::endl; } Example Output Before swap: x = 42, y = 0 After swap: x = 0, y = 42
void main() { int a=2,b=5; b=a+b; a=b-a; b=b-a; getch(); }
Use a temporary variable. Example (swap variables "a" and "b"): int a = 5; int b = 10; // Swap the variables int temp; temp = a; a = b; b = temp; System.out.println("a = " + a); System.out.println("b = " + b);Use a temporary variable. Example (swap variables "a" and "b"): int a = 5; int b = 10; // Swap the variables int temp; temp = a; a = b; b = temp; System.out.println("a = " + a); System.out.println("b = " + b);Use a temporary variable. Example (swap variables "a" and "b"): int a = 5; int b = 10; // Swap the variables int temp; temp = a; a = b; b = temp; System.out.println("a = " + a); System.out.println("b = " + b);Use a temporary variable. Example (swap variables "a" and "b"): int a = 5; int b = 10; // Swap the variables int temp; temp = a; a = b; b = temp; System.out.println("a = " + a); System.out.println("b = " + b);
By using a third temporary variable. $tmp = $a; $a = $b; $b = $tmp;
You can either insert one list directly into the other, or you can create a completely new list and insert the two lists one after the other. Neither method requires a temporary variable. Temporaries are only required when you need to swap one list for another, but you can minimise this requirement by using "move semantics", where the lists can simply swap their resources, not the elements themselves. In this way, only one temporary is required.