can't run my program

[DUDEMAN]

guys there is something wrong with my code and i cant find what. can you help

#include<iostream>
using namespace std;

int main(void)
{

system("TITLE Ellis Kenyo's Calculator");
system("COLOR 3A");
char eChar;
double dfirstnumber;
double dsecondnumber;
char cDoagain;

do
{
system("CLS");
cout << "plese enter the first number you would like to use"<< endl;
cin >> dfirstnumber;
cout << "please enter the operation you would like to complete" << "(+,-,* or /)" << endl;
cin >> eChar;
cout << "please enter the second number you would like to use" << endl;

switch (eChar)(
case (+) ;
cout << "The answer is: " << dfirstnumber << " + " << dsecondnumber << "=" << (dfirstnumber + dsecondnumber) << endl;
break;
case " - ";
cout << "The answer is: " << dfirstnumber << " - " << dsecondnumber << "=" << (dfirstnumber - dsecondnumber) << endl;
break;
case " * ";
cout << "The answer is: " << dfirstnumber << " * " << dsecondnumber << "=" << (dfirstnumber * dsecondnumber) << endl;
break;
case"x";
cout << "The answer is: " << dfirstnumber << " x " << dsecondnumber << "=" << (dfirstnumber * dsecondnumber) << endl;
break;
case"X";
cout << "The answer is: " << dfirstnumber << " X " << dsecondnumber << "=" << (dfirstnumber + dsecondnumber) << endl;
break;
case"/";
if (dsecondnumber == 0) (
cout << "that is an invalid operation" << endl;
)else(
cout << "The answer is: " << dfirstnumber << " / " << dsecondnumber << "=" << (dfirstnumber / dsecondnumber) << endl;
)
break;
default;
cout << "that is an invalid operation" <<endl;
break;
)
cout << "Would you like to strt again? (y or n)" endl;
cin >> cDoagain;
)while (cDoagain == 'Y' || cDoagain =='y');

system ("PAUSE");
return 0;
)
there is apparantly something wrong with the "case" function. please help

[Mitsakos]

All your cases are wrong...
You should open and close brackets {} not parenthesis...
And your cases from case (+) ;
should be case '+' :

The same thing for all the other cases... (You must replace the double quotes with single ones since you have chars)

[DUDEMAN]

tyvm
its my 1st day programming and im a bit nooby
lol