c语言中","表达式

“，”表达式：结合从左到右，取最后一个表达式的值作为结果

#include<stdio.h>
int main()
{
 int a = 3;
 int b = 3; 
 int c = 3;
 int d = 0;
 d = (a++, b++, a + b + c);
 printf("d = %d\n", d);
 return 0；