Going thorugh preprocessor chapter

c_modern_approach/Preprocessor/celcius.c

@@ -0,0 +1,17 @@
+#include "stdio.h"
+#include <stdio.h>
+
+#define FREEZING_PT 32.0f
+#define SCALE_FACTOR (5.0f / 9.0f)
+
+int main(void) {
+  float farenheit, celsius;
+
+  printf("Enter Fahrenheit temperature: ");
+  scanf("%f", &farenheit);
+
+  celsius = (farenheit - FREEZING_PT) * SCALE_FACTOR;
+
+  printf("Celcius equivalent is: %.1f\n", celsius);
+  return 0;
+}

c_modern_approach/Preprocessor/double_hashtag_op.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+#define MK_ID(n) i##n
+
+int main(int argc, char *argv[]) {
+  int MK_ID(1); // This converts to `int i1`
+  printf("%d", i1);
+}

c_modern_approach/Preprocessor/macro_rules.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+#define SIZE 256
+
+int main(int argc, char *argv[])
+{
+  int BUFFER_SIZE;
+  if (BUFFER_SIZE > SIZE)
+    puts("ERROR: SIZE exceeded");
+}
+
+/*
+ * Код выше трансформируется в следующее:
+ *
+ *
+ * int main(int argc, char *argv[])
+ * {
+ *   int BUFFER_SIZE;
+ *   if (BUFFER_SIZE > 256)
+ *     puts("ERROR: SIZE exceeded");
+ * }
+*/

c_modern_approach/Preprocessor/parametrized_macroses.c

@@ -0,0 +1,9 @@
+#include <stdio.h>
+#define MAX(x, y) ((x) > (y) ? (x) : (y))
+
+int main(int argc, char *argv[]) {
+  int j, k;
+  j = 10;
+  k = 20;
+  printf("%d", MAX(j, k));
+}

c_modern_approach/Preprocessor/playground.c

@@ -0,0 +1,9 @@
+#include <stdio.h>
+#define PRINT_INT(n) printf(#n " AND " #n " = %d\n", n)
+
+int main(void) {
+  int i, j;
+  i = 10;
+  j = 20;
+  PRINT_INT(i / j);
+}

c_modern_approach/Preprocessor/undef.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+#define SIZE 100
+int main(int argc, char *argv[]) {
+  int i;
+  i = 101;
+#undef SIZE
+  if (i > SIZE) {
+    printf("Yey!\n");
+  }
+}

c_modern_approach/README.md

@@ -0,0 +1,2 @@
+# Точка останова
+Creating longer macros - 328