The following example shows how you can nest preprocessor conditional compilation directives:
#if defined(TARGET1) # define SIZEOF_INT 16 # ifdef PHASE2 # define MAX_PHASE 2 # else # define MAX_PHASE 8 # endif #elif defined(TARGET2) # define SIZEOF_INT 32 # define MAX_PHASE 16 #else # define SIZEOF_INT 32 # define MAX_PHASE 32 #endif
The following program contains preprocessor conditional compilation directives:
/** ** This example contains preprocessor ** conditional compilation directives. **/ #include <stdio.h> int main(void) { static int array[ ] = { 1, 2, 3, 4, 5 }; int i; for (i = 0; i <= 4; i++) { array[i] *= 2; #if TEST >= 1 printf("i = %d\n", i); printf("array[i] = %d\n", array[i]); #endif } return(0); }