c++ - Not Detecting Input Properly -


i've started c++ today, , working on advanced text-based calculator. anyways, i'm working on exponents, when start program, , enter string starts exponent mode, doesn't go expponent mode, regular calculator mode. here code:

// //  main.cpp //  c++ calculator //  basic calculator application run through command line. //  v.0.02 - second version of calculator, basic text, command line interface, loop. //  created johnny carveth on 2013-04-17. //  copyright (c) 2013 johnny carveth. rights reserved. // #include <math.h> #include <iostream> int int1, int2, answer; bool bvalue(true); std::string oper; std::string cont; using namespace std; std::string typeofmath; double a; double b; int answerexponent;   int main(int argc, const char * argv[]) {      // taking user input, first number of calculator, operator, , second number.   addition, substraction, multiplication, division     cout<<"______________________________________________\n";     cout<<"|welcome expcalc! want   |\n";     cout<<"|exponent math, or basic math(+, -, x, %)    |\n";     cout<<"|type in 'b' basic math, and'e'      |\n";     cout<<"|exponential math! enjoy! (c) john l. carveth|\n";     cout<<"|____________________________________________|\n";     cin>> typeofmath;     if(typeofmath == "basic" || "basic" || "b" || "b")     {         cout << "hello! please type in first integer!\n";         cin>> int1;         cout<<"great! enter operation: ex. *, /, +, -...\n";         cin>> oper;         cout<<"now need last int!\n";         cin>> int2;          if (oper == "+") {             answer = int1 + int2;         }         if (oper == "-") {             answer = int1 - int2;          }if (oper == "*") {             answer = int1 * int2;         }if (oper == "/") {             answer = int1 / int2;         }         cout<<answer << "\n";         cout<<"thanks using expcalc!\n";      }else if(typeofmath == "exp" || "e" || "e" || "exponent"){         cout<<"enter desired base. example: 2^3, 2 base.\n";         cin>> a;         cout<<"now desired exponent/power of base? ex. 2^3 3 exponent!\n";         cin>>b;         answerexponent = double (pow(a,b));     } else(cout<<"wrong string!"); }

helpful tips only, remember first day c++. if of help, i'm using xcode 4!

you may want @ if expression

if(typeofmath == "basic" || "basic" || "b" || "b")

each thing between || evaluated conditional. try like:

if(typeofmath == "basic" ||     typeofmath == "basic" ||    typeofmath == "b" ||     typeofmath =="b") {  // basic

make same modifications else if(typeofmath == "exp" || "e" || "e" || "exponent")


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