第十周程序填充

问题及代码：

</pre><p> </p><pre class="cpp" name="code">#include <iostream>using namespace std;int main(){    int a = 100;    int b = 20;    int c;    char oper;    cin>>a>>oper>>b;    switch(oper)  //(1)    {    case '+':        c = a + b;        break;    case '-':        c = a - b;        break;    case '*':        c = a * b;        break;    default :        if( b==0)            c = a;        else            c = a / b;        break;    }    cout<<"c="<<c<<endl;    return 0;}

 

运行结果：

知识点总结：oper是定义的字符，switch后面只能用oper了