【C语言高级操作】之坐井说天阔

1.定义的变量既是实参，又是返回值

#include <stdio.h>

int test(int a)
{
	printf("111 %d",a);
	int b = a+10;
	return (b);
}
int main()
{
   /*  Write C code in this online editor and run it. */
	int a = test(a);
   printf("Hello, World! %d\n",a);
   
   return 0;
}

//输出结果：
//111 0Hello, World! 10

可以看出：

int a = test(a);
//等价
 int  a = 0;
a = test(a);