不用中间值将两个值进行交换

#include
int main(){
int a =3;
int b=5;
a=a+b;
b=a-b;
a=a-b;
printf("%dn%d",a,b);
return 0;
}

#include//
int main(){
int a =3;
int b=5;
a=a^b;
b=a^b;
a=a^b;
printf("%dn%dn",a,b);
return 0;
}