switch语句输出四则运算c语言

#include
int main()
{
int i,j;
char a;
scanf("%d%c%d",&i,&a,&j);
switch(a)
{
case ‘+’:
printf("%dn",i+j);
break;//跳出当前的switch语句
case '’:
printf("%dn",ij);
break;
case ‘-’:
printf("%dn",i-j);
break;
case ‘/’:
printf("%dn",i/j);
break;
default:
printf(“输入有误”);//当输入错误的字符时
}
return 0;
}