Or operator not working

Question

When I enter start then the program outputs the else function even though I fulfilled the criteria, I have tried with && as well and it still didn\'t work. Any answe

Answer 1

The || works only in logical boolean expression.

From the standard (emphasis is mine):

5.15 Logical OR operator [expr.log.or]

The || operator groups left-to-right. The operands are both contextually converted to bool (Clause 4). It returns true if either of its operands is true, and false otherwise.

So in input.find("end" || "End"), it tries to convert "end" and "End" to bool. And the operator || will return a bool also.

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Here to solve your problem you need to replace:

if (input.find("end" || "End") != std::string::npos)

by

if ( input.find("End") != std::string::npos ||
     input.find("End") != std::string::npos )

And do the same in the second find.