VS2019写的简单四则运算计算器出错，求大佬斧正o(0﹏0)o

[pananiu1]

#include<stdio.h>
int main()
{
	int num1, num2;
	char ch;
	float result;
	printf("please input :");

	scanf_s("%d %c %d", &num1, &ch, &num2);

	switch (ch)
	{
	case '+':num1 + num2;break;
	case '-':result = (float)num1 - num2;break;
	case '*':result = (float)num1 * num2;break;
	case '/':
		if (num2 == 0)
		{
			printf("你错了");
			break;
		}
		else
		{
			result = num1 / num2;
			break;
		}


	}




	printf("结果是:%.2f\n", result);



	return 0;
}

[redleafe]

Switch语句建议把default:补上。

[老夏]

case '+':num1 + num2; 没有 result =