用c语言编程“用键盘输入两个数和运算符号输出结果”

#include
int main()
{
int a,b,c;
char ch;
printf("请输入：");
scanf("%d%c%d",&a,&ch,&b);
if(ch=='+')
c=a+b;
else if(ch=='-')
c=a-b;
else if(ch=='*')
c=a*b;
else if(ch=='/')
c=a/b;
printf("%c\n",c);
return 0;
}