不使用+实现两数相加

#include <stdio.h>
int plus(int a, int b)
{int sum=0,addication=0;while(b!=0){sum = a^b;addication = (a&b)<<1;a = sum;b = addication;}return a;
}

不使用-实现两数相减

#include <stdio.h>
int sub(int a, int b)
{int sum=0,abdciation=0;while(b!=0){sum = a^b;abdciation = (~a&b)<<1;a = sum;b = abdciation;}return a;
}