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c++,c---------->运算符和表达式

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
int main(){
	/*运算符*/
	/*算数运算符*/
	//+,-,*,/,%
	int a=20 , b=32 ;
	
	printf("a+ b=%d\n",a + b);
	printf("a-b=%d\n", a - b);
	printf("a*b=%d\n", a * b);
	printf("a/b=%f\n", a / b);
	printf("a%b=%d\n", a % b);

	//自增自减法(++,--)
	int c = 1, d = 2;
	//c++;//c=c+1//c+=1
	//printf("%d\n", c);
	//d--;//d=d-1//d-=1
	//printf("%d\n", d);
	//后置++
	int e=c++;//e=c=1;c=c+1;
	printf("c=%d\n", c);
	printf("e=%d\n", e);
	//前置++
	int g = ++c;//c=c+1;e=c=2;
	printf("c=%d\n", c);
	printf("e=%d\n", g);

	//关系运算符
	/*>,<,>=,<=,==,!=*/
	printf("c=%d\n", c>d);
	printf("c=%d\n", c<d);
	printf("c=%d\n", c>=d);
	printf("c=%d\n", c<=d);
	printf("c=%d\n", c==d);
	printf("c=%d\n", c!=d);

	//逻辑运算符
	/*&&,||,!*/
	//&&:同真为真,否则为假;0为假
	printf("%d\n", 1 && -3);
	//||:有真则真,否则为假;0为假
	printf("%d\n", 0 || 0);
	//!:真变假,假变真

	//条件运算算符 :三目与运算符
	int i = 2, o = 33;
	printf("%d\n",o<i?o:i);

	//赋值运算符
	/*=,+=,-=,*=,/=,%= */
	int x = 10;
	printf("x=%d\n", x+=1);//x=x+1
	printf("x=%d\n", x-=1);//x=x-1
	printf("x=%d\n", x*=1);//x=x*1
	printf("x=%d\n", x/=1);//x=x/1
	printf("x=%d\n", x%=1);//x=x%1
	printf("x=%d\n", x=1);//x=1
	//逗号表达式:","起到分割做用
	//强制数据类型转换
	float n = 1;//隐示转换
	int s = (int)123.123;//强制转换
	printf("%d\n", s);
	printf("%f\n", n);

	//位运算符(二进制)
	/*~ :按位非 |:按位或 &:按位与 ^:按位异或  <<:左移 >>:右移*/
	/*左移是乘2 右移是除2*/
}   
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