problem with c++

[wind0]

please tell me what's wrong with the program
thx.

#include<iostream>
#include<cmath>
#include<fstream>
using namespace std;

void menu();
void fuc1();
void fuc2();
double calculate(double);

int main()
{
    char choice;
    
    menu();
    cout<<"Enter choice: ";
    cin>>choice;
    
    if(choice=='+'||'-'||'*'||'/'||'%'||'P'||'A'||'X')
      fuc1();
    else if(choice=='R'||'F'||'T')
      fuc2();
    else
      exit;
    
    system("pause");
    return 0;
}

void menu()
{
     cout<<"+,-,*,/,%"<<endl;
     cout<<"A\t averge"<<endl;
     cout<<"X\t maximum"<<endl;
     cout<<"P\t a^b"<<endl;
     cout<<"R\t reciprocal"<<endl;
     cout<<"F\t factorial"<<endl;
     cout<<"T\t square root"<<endl;
     cout<<"Q\t quit"<<endl;
}
void fuc1()
{
     int operand1,operand2,result;
     char choice;
     
     cout<<"Enter two values you want to calculate: ";
     cin>>operand1 >>operand2;
     if(choice=='+')
       result=operand1+operand2;
     if(choice=='-')
       result=operand1-operand2;
     if(choice=='*')
       result=operand1*operand2;
     if(choice=='/')
       result=operand1/operand2;
     if(choice=='%')
       result=operand1%operand2;
     if(choice=='P')
       result=pow((double)operand1,(double)operand2);
     if(choice=='A')
       result=(operand1+operand2)/2;
     else
       if(operand1>operand2)
         result=operand1;
       else
         result=operand2;
     
     cout<<choice<<" "<<result<<" "<<operand1<<" "<<operand2<<endl;
}
void fuc2()
{
     double operand1,result;
     char choice;
     
     cout<<"Enter one value you want to calculate: ";
     cin>>operand1;
     calculate(operand1);
     cout<<choice<<" "<<result<<" "<<operand1<<endl;
}
double calculate(double x)
{
       char choice;
       double result;
       
       if(choice=='R')
         result=1/x;
       else if(choice=='F')
         for(int i=1;i<=x;i++)
            result*=i;
       else
         result=sqrt(x);
         
         return result;
}