java逻辑运算符 C语言结构体定义

l138494274512024-10-21 10:04

复制代码

public static void main(String[] args) {
    System.out.println(true&true);//&两者均为true才true
    System.out.println(false|false);// | 两边都是false才是false
    System.out.println(true^false);//^ 相同为false，不同为true
    System.out.println(!false);// ！取反,!具有多个反应
}

//结构体的定义

//1.先声明，再定义

/*struct student

{

int num;

int C_score;

int ps_score;

float avg; //数据类型内不能赋初值

};

int main(void)

{

//定义：类型名+变量名

int c=0;

struct student Tom = {10,90,98,94.5};//可单独赋值

//struct student为类型名，Tom为变量名

c = 50;

Tom.num = 12;

Tom.C_score = 99;

Tom.ps_score = 96;

Tom.avg = 94.5; //就是变量

printf("序号:%d\n", Tom.num);

printf("c语言成绩:%d\n", Tom.C_score);

printf("PS成绩:%d\n", Tom.ps_score);

printf("平均分:%d\n", Tom.avg);

//与上面的一样

return 0;

}*/

//2.声明的同时，直接定义

/*struct student

{

int num;

int C_score;

int ps_score;

float avg;

}Terry，jem;//均为结构体变量

int main(void)

{

}*/

//3.省略结构体变量，直接定义结构体变量

struct student

{

int num;

int score $3$ ;

float avg;

};

int main(void)

{

struct student Tom = { 10,{90,90,90},90 };

struct student Jim = { 10,90,90,90,90,};

//两者大部分相同，除非数字个数不同时

printf("序号:%d\n", Jim.num);

printf("成绩1:%d\n", Jim.score $0$ );

printf("成绩2:%d\n", Jim.score $1$ );

printf("成绩3:%d\n", Jim.score $2$ );

printf("平均分:%f \n", Jim.avg);

return 0;

}