🔒 Locked

String Question

Started by programmer2 Apr 12, 2002 at 1:16 PM 0 replies 300+ views

Original Post

Apr 12, 2002 at 1:16 PM

I know how to make a string by using an array, like mystring[10] But then when I try to assign a value to it, it says no l-value on the left side of the equals sign. I''ve tried strcpy and looked around, but I can''t figure out how to declare a string in one spot and assign a value to it in another. I also get an error using switch(), if I fill all the cases up with string value assignments, it says I''m initializing it more than once. It gave me about 90 errors at once for a big block of them. How do I fix this?

Null and Void

163

Null and Void

Apr 12, 2002 at 1:28 PM

You can''t assign a pointer to an array. You can''t switch an array or a pointer. You can use strcpy like this:


#include <string.h>

char my_string[10];
strcpy(my_string,"abcdefghi");

/* Now, my_string contains:
  my_string[0]    ''a''
  my_string[1]    ''b''
  my_string[2]    ''c''
  my_string[3]    ''d''
  my_string[4]    ''e''
  my_string[5]    ''f''
  my_string[6]    ''g''
  my_string[7]    ''h''
  my_string[8]    ''i''
  my_string[9]    ''\0''
*/

To test if a string is equal to another, you can use strcmp:


#include <string.h>

if(strcmp(my_string,"abcdefghi") == 0) {
  /* The strings are equal */
} else {
  /* The strings are not equal */
}

You can use the STL''s string class to get around much of this, if you''re programming in C++ (as oppossed to C).

Topic Locked

This topic has been locked by a moderator. New replies are not allowed.