C 三目运算符

 

#include<stdio.h>
int main (int argc,char ** argv){
    printf(1<2?"Hello world!\n":"Good bye\n");

    if (1<2)
            printf("Hello , world!\n");
    else
            printf("Good bye!\n");
    return 0;
}
执行结果：
Hello world!
Hello , world!

printf(1<2?"Hello world!\n":"Good bye\n");
等价于
if(1<2)printf(""Hello world!\n");
else printf(""Good bye\n");