Question

1. What is wrong with the following C++ program? #include <iostream> int main() { a = 4; b = 6; cout << a << "+" << b << "=" << a+b; return 0; 2. What is wrong with the following C++ program? What was its intended output? #include <iostream> using namespace std; int main() { cout << "What is larger? e pi or pi e?" << endl; double ans1 = exp(pi); double ans2 = pi exp(1.); cout << "epi is " << ans1 << endl; cout << "pi'e is " « ans2 << endl; return 0;

Answer 1

Here in first program, the datatype of a and b is not declared which would give an error.

I have tried running the code and here is the screen shot of error

/CCR/UserFiles/2.cpp:4:2: error: use of undeclared identifier 'a' a=4; fatal error: too many errors emitted, stopping now [-ferror-limit=] 2 errors generated. Run Again

In second program the value of pi is not defined which will give an error while running the program..

Here is the screen shot of the error..

~/CCR/UserFiles/2.cpp:5:18: error: use of undeclared identifier 'pi' double ansl=exp(pi); 1 error generated. Run Again

The intended output is to compute e^π and π^e which can be done using the code given in screenshot

2.cpp 1 using namespace std; 2 #include <math.h> 3 int main() 4 1 double pi=3.1416; 6 double ansl=exp(pi); 7 cout<<"epi :="<<ansl; 8 double ans2= exp(1); double ans3=pow(pi, ans2); //double ans2=pow(pi, exp); cout<<"\nValue of e :="<<ans2; 12 cout<<"\npine :="<<ans3; return 0; 14 } 9 10 11 P Q Run

The output will be as follows:

epi :=23.1409 Value of e :=2.71828 pine :=22.4593 Run Again