can anyone help me with this error message ?

The following code yields an error message:

Code:

---

// 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:

Quote:

---

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 !

it should work this way

Code:

---

#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.

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 ?

Quote:

---

Originally Posted by 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 ?

---

you cannot do what you want
as the compiler tells you

Code:

---

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

---

first mistake:

Code:

---

  switch(month) // month is a pointer

---

second mistake:

Code:

---

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

---

the closest you can get is something like

Code:

---

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

---

K

Quote:

---

Originally Posted by 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 ?

---

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...

Now the picture is clear !