added chapter 26, 27 and 28

0x001a_operators/main.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include "pico/stdlib.h"
+#include "pico/cyw43_arch.h"
+
+int main(void)
+{
+    stdio_init_all();
+
+    int x = 5;
+    int y = 10;
+    int arithmetic_operator = (x * y);
+    int increment_operator = x++;
+    bool relational_operator = (x > y);
+    bool logical_operator = (x > y) && (y > x);
+    int bitwise_operator = (x<<1);  // x is now 6 because of x++ or 0b00000110 and (x<<1) is 0b00001100 or 12 
+    int assignment_operator = (x += 5);
+
+    while (true)
+    {
+        printf("arithmetic_operator: %d\r\n", arithmetic_operator);
+        printf("increment_operator: %d\r\n", increment_operator);
+        printf("relational_operator: %d\r\n", relational_operator);
+        printf("logical_operator: %d\r\n", logical_operator);
+        printf("bitwise_operator: %d\r\n", bitwise_operator);
+        printf("assignment_operator: %d\r\n", assignment_operator);
+    }
+}