Wednesday, December 30, 2015
C Program to swap two numbers without using a temporary variable
C Program to swap two numbers without using a temporary variable
First Method
First Method
#include <stdio.h> int main(void) { int a=3,b=6; a = a + b; // a = 9 b = a - b; // b = 3 a = a - b; // a = 6 printf("a=%d,b=%d",a,b); return 0; }
Second Method (using XOR operator)
Third Method
#include <stdio.h> int main(void) { int a=3,b=6; a = a ^ b; // a = 5 b = a ^ b; // b = 3 a = a ^ b; // a = 6 printf("a=%d,b=%d",a,b); return 0; }Note: Binary XOR Operator copies the bit if it is set in one operand but not both.
a = 3 = 011 b = 6 = 110 ------------- a^b = 5 = 101
Third Method
#include <stdio.h> int main(void) { int a=3,b=6; a = a * b; // a = 18 b = a / b; // b = 3 a = a / b; // a = 6 printf("a=%d,b=%d",a,b); return 0; }
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