如何使用C中的按位运算符判断数字是否等于另一个数字

Question

I am writing a program where I have an infinite loop doing something with a stopping condition to break if some variable a == 1 using only bitwise operators.

How would I do this?

Example code:

while(1){
    int a;
    //do some work
    if (a==1){ // how do I say this with bitwise operators and no "!"
        break;
    }
}

Answer 1

Since OP's stopping condition is at the end of the loop, code can use a do() loop.

int a;
do {
  // some work that sets `a`
} while (a^1);

When a has the value of 1, a ^ 1 --> 0 .