#include<stdio.h>   /**/
void main()
{
	int a,b,c;
	a=b=c=3;
	printf("\n");
	printf("  a=%d\n",a);
	printf("  b=%d\n",b);
	printf("  c=%d\n\n",c);
	printf("  逗號表達式a=3,b=a+2,c=b+2;的值為%d\n",(a=3,b=a+2,c=b+2)); //逗號式值為7
	printf("  a=%d b=%d c=%d\n",a,b,c);
	a,b,c;
	printf("  逗號表達式a,b,c;的值為%d\n",(a,b,c));  //逗號式值為7
	printf("\n");


}