#include <stdio.h>
int main() {
int a = 10, b = 20;
// Arithmetic swap
a = a + b;
b = a - b;
a = a - b;
printf("After arithmetic swap: a = %d, b = %d\n", a, b);
// Reset values
a = 10;
b = 20;
// XOR swap
a = a ^ b;
b = a ^ b;
a = a ^ b;
printf("After XOR swap: a = %d, b = %d\n", a, b);
return 0;
}Coding works best on desktop or with an external keyboard.
Demonstrates swapping two variables in C without using a temporary variable. Shows both arithmetic method and XOR bitwise method used in programming logic questions.
#include <stdio.h>
int main() {
int a = 10, b = 20;
// Arithmetic swap
a = a + b;
b = a - b;
a = a - b;
printf("After arithmetic swap: a = %d, b = %d\n", a, b);
// Reset values
a = 10;
b = 20;
// XOR swap
a = a ^ b;
b = a ^ b;
a = a ^ b;
printf("After XOR swap: a = %d, b = %d\n", a, b);
return 0;
}C is a general-purpose, procedural programming language that provides low-level access to memory, efficient performance, and a foundation for system and application software development.
Origin & Creator
Created by Dennis Ritchie at Bell Labs in 1972, originally for developing the UNIX operating system.
Industrial Note
C is essential in embedded systems, OS kernels, compilers, device drivers, and performance-critical applications where low-level memory control and speed are required.