简单计算器

简单计算器

/problem-sets/1325975206586703872/problems/1325977648841842690

QAQ,它真的只是个简单计算器,千万不要往复杂的方向想!!!

#include<stdio.h>
int main(void)
{
	int sum=0;
	int num,i;
	char symbol;
	scanf("%d",&sum);
	for(i=1;-1;i++)
	{
		scanf("%c",&symbol);
		switch(symbol)
		{
			case '+':
				scanf("%d",&num);
				sum = sum+num;
			break;
			case '-':
				scanf("%d",&num);
				sum = sum -num;
			break;
			case '*':
				scanf("%d",&num);
				sum = sum*num;
			break;
			case '/':
				scanf("%d",&num);
				if(num==0)
				{
					printf("ERROR");
					goto end;
				}
				else sum = sum/num; 
			break;
			case '=':goto output;
			default:printf("ERROR");goto end;
		}
	}
	output:
	printf("%d",sum);
	end:
	return 0;
}