#include <stdio.h> void change(int *,int*); int main () { int a=2,b=5; printf("Before : a=%d,b=%d\n",a,b); change(&a,&b); printf("After : a=%d,b=%d\n",a,b); return 0; } void change(int *a,int *b){ *a += *b; *b = *a-*b; *a = *a-*b; }
#include <stdio.h> #define SWAP(x,y) x ^= y, y ^= x, x ^= y int main () { int a=2,b=5; printf("Before : a=%d,b=%d\n",a,b); SWAP(a,b); printf("After : a=%d,b=%d\n",a,b); return 0; }
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