/*
#include <stdio.h>

int main()
{
	/* 局部变量声明 
	int a, b;
	int c;

	/* 实际初始化 
	a = 10;
	b = 20;
	c = a + b;

	printf("value of a = %d, b = %d and c = %d\n", a, b, c);

	return 0;
}
*/