计算加减乘除switch

#include<stdio.h>
int main()
{
	int a;
	int b;
	char c;
	printf("请输入a（+-*/）b：\n");
	part1:
	scanf("%d",&a);
  
	scanf(" %c",&c);
   
	scanf("%d",&b);
	  switch(c)
	  {
	  case'+':
		  printf("%d",a+b);
		  break;

	  case'-':printf("%d",a-b);break;

	  case'*':printf("%d",a*b);break;

	  case'/':printf("%d",a/b);break;
		  default:break;
	  }
	  printf("\n");
	  goto part1;
	return 0;
}#include<stdio.h>
int main()
{
	int a;
	int b;