main.c
#include <stdio.h> int main(int argc, char **argv) { int a, b; a = 1; b = -2; printf("before: a=%d, b=%d\n", a, b); a = a ^ b; b = a ^ b; a = a ^ b; printf("after: a=%d, b=%d\n", a, b); return 0; }
結果
before: a=1, b=-2 after: a=-2, b=1