example:
1.运算符:
#include<stdio.h> int main(){ int a , b , c ,d ; a = ; b = a++;//先赋值给b,a再自增 c = ++a;//先加后赋值给c d = *a++;//相当于 d=(10*a),a=a+1 printf("b,c,d :%d,%d,%d",b,c,d); } output: b ,c ,d ,,
2.两种方法实现交换两个变量的值
方法-:中间变量 ,b=,temp; temp = a; a = b ; b = temp; 方法二: ,b=; a = a + b; b = a - b; a = a - b;