can anyone help me with this error message ?

[PsSheba]

The following code yields an error message:

// temp1.cpp
 
#include <iostream>
using std::cout;
 
void myM(char *);
 
int main()
{
   myM("june");
   return 0;
}
void myM(char *month)
{
   switch(month)
   {
      case 'june':
         cout << "\nJune";
   }
}


after compilation i recieve an error message saying:

error e2383 switch selection expression must be of integral type in function myM(char *)

can anyone tell me how to change the code so it doesnt yield an error message ?
Thanks !

[ZuK]

it should work this way

#include <iostream>

enum month {
   jan, feb, mar // ....
};  

void myM(month m);
 
int main()
{
   myM(jan);
   return 0;
}
void myM(month m)
{
   switch(m)
   {
      case jan:
         std::cout << "\nJanuary";
   }
}

K.

[PsSheba]

But i'd rather stick to my code. The example i sent is only a part of a larger code and i cannot change it. Any idea whats wrong with the code i sent ?

[ZuK]

But i'd rather stick to my code. The example i sent is only a part of a larger code and i cannot change it. Any idea whats wrong with the code i sent ?

you cannot do what you want
as the compiler tells you

switch selection expression must be of integral type in function myM(char *)

first mistake:

   switch(month) // month is a pointer

second mistake:

      case 'june': // 'june' is not a valid construct in C/C++

the closest you can get is something like

void myM(char *month)
{
   std::string m(month);
   if ( m == "june" )
      cout << "\nJune";
   else if ( m == "april" )
      cout << "\nApril";
   }
}

K

[Andreas Masur]

But i'd rather stick to my code. The example i sent is only a part of a larger code and i cannot change it. Any idea whats wrong with the code i sent ?

The 'switch' statement can only work on expressions which are of integral type or of a class type for which there is an unambiguous conversion to integral type which isn't the case in your example...

[PsSheba]

Now the picture is clear !