Swap Two Numbers Without Using a Temporary Variable (C)
In this video, we solve a classic C programming problem: swapping two integers without using any extra variable.
We use the addition–subtraction method to perform the swap in constant time.
Input: Two integers a and b
Output: Swapped values of a and b
Method Used: Addition & Subtraction (Dont use it, it is not recomended. Try it just for educational pyrposes).
Language: C
IDE Used: Dev-C++ (works in Code::Blocks, GCC, etc.)
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Source Code:
#include stdio.h
int main(){
int a,b;
scanf("%d %d", &a, &b);
printf("Before Swap: A = %d, B = %d \n", a,b);
a = a + b;
b = a - b;
a = a - b;
printf("After Swap: A = %d, B = %d", a,b);
return 0;
}
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