简单计算器实现

(win32)简单计算器实现

编译环境vs17，实现功能（+ - * /）

 int Myadd(int x, int y)
{
     
	return   x + y;

}
int Mysub(int x, int y)
{
     
	return   x - y;

}
int Mymul(int x, int y)
{
     
	return   x * y;

}
int Mydiv(int x, int y)
{
     
	if (y == 0)
	{
     
		printf("div zero\n");
		return  -1;
	}
	return   x / y;

}



Menu()
{
     
	printf("#############################\n");
	printf("###1. Add            2.Sub###\n");
	printf("###3. Mul            4.Div###\n");
	printf("###                  0.Exit##\n");
	printf("#############################\n");
	printf("###Please Select:         ###");

}


int main()
{
     
	int select = -1;
	int(*p[5])(int, int) = {
      NULL, Myadd, Mysub, Mymul, Mydiv };//函数指针数组
	const char *op = " +-*/";
	Menu();
	scanf("%d", &select);
	while (1)
	{
     
		if (select == 0)
			{
     
			 printf("bye bye\n");
			 break;

			}
		else if (select > 0 && select < 5)
		{
     

			int x, y;
				printf("Please enter your data: ");
				scanf("%d %d", &x, &y);

			int z = p[select](x, y);
			printf("result: %d %c %d=%d\n", x, op[select], y, z);

		}

		else
		{
     
			printf("select error   peease try again\n");

		}
	}


	return 0;
}

结果

图1

图2

图3

图4