很好的C程序设计教程

				/*文件名:prog2.cpp*/
				#include 
				main()
				{
					int a=1;
					char c='a';
					float f=2.0;
					printf("①:%d\n",a>0?a:-a);
					printf("②:%d\n",f==3.0?a=c);
					printf("③:%d\n",!(a==0)?!!a:!a);
					printf("④:%d\n",(f>0)?((a>0)?2:1):((a>0)?1:0));
					printf("⑤:%d\n",(a>=0)?(a=1):(a=0));
					printf("⑥:%d\n",(c=='A')?(0,1):(1,0));
				}