关系和逻辑运算

#include <stdio.h>

int main(void)
{
    int logic;

    int a = 1;
    int b = 2;
    int c = 3;

    logic = a + b > c && b <= c;
    printf("logic = %d\n",logic );    //输出0

    logic = a >= b + c || b == c;
    printf("logic = %d\n",logic );    //输出0

    logic = !(a < c) + b != 1 && (a + c)/2;
    printf("logic = %d\n",logic );    //输出1

    /**
         !(a < c) + b != 1 && (a + c)/2
         ==> ((!(a < c) + b) != 1) && (( a + c)/2 )
         ==> ((! 1 + b) != 1 ) && (4 / 2)
         ==> 1 && 2
         ==> 1
    */

    return 0;
}


/**
    除运算符"!"之外，所有关系和逻辑操作符的优先级都低于算术操作符
*/