ISO C++ forbids comparison between pointer and integer [-fpermissive]| [c++]

Question

I am trying to compile the following code on Ubuntu (64-bit), with Code::Blocks 10.05 as IDE:

#include 
using namespace std;
int main() {
            


        

Answer 1

This one is due to:

if(a=='ab') , here, a is const char* type (ie : array of char)

'ab' is a constant value,which isn't evaluated as string (because of single quote) but will be evaluated as integer.

Since char is a primitive type inherited from C, no operator == is defined.

the good code should be:

if(strcmp(a,"ab")==0) , then you'll compare a const char* to another const char* using strcmp.