我可以使用第三个变量，但解决不了，而无需使用第三个变量解决。

 无效swap_int（无符号整数*一，无符号整型* B）{
   *一个^ = * B; //那之后：一个==（orig_a ^ orig_b）
   * B ^ = * A; //那之后：乙==（orig_b ^一）==（orig_b ^ orig_a ^ orig_b）== orig_a，因而被转移到b
   *一个^ = * B; //后认为：一==（orig_a ^ orig_b）^ B ==（orig_a ^ orig_b）^ orig_a == orig_b，因此我们很高兴，并准备
}
 

I can solve it using third variable but can't solve without using third variable.

void swap_int(unsigned int *a, unsigned int *b) {
   *a^=*b; // After that: a==(orig_a ^ orig_b)
   *b^=*a; // After that: b==(orig_b ^ a)==(orig_b ^ orig_a ^ orig_b)==orig_a, thus a was moved to b
   *a^=*b; // After that: a==(orig_a ^ orig_b) ^ b==(orig_a ^ orig_b) ^ orig_a==orig_b, thus we are happy and ready
}