Use of undeclared identifier 'true'
The identifier true is not declared by default. To use it, two solutions :
- Compile in C99 and include
<stdbool.h>. - Define this identifier by yourself.
However, the infinite loop for (;;) is often considered as better style.
C has no built-in boolean types. So it doesn't know what true is. You have to declare it on your own in this way:
#define TRUE 1#define FALSE 0[...]while (TRUE) { [...]}
Include stdbool.h to use C99 booleans.
If you want to stick with C89 define it yourself:
typedef enum{ true=1, false=0}bool;