Update progress to exercise 5

CMakeLists.txt

@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.0)
 project(learningc LANGUAGES C)
 
 set(CHAPTER 2)
-set(EXERCISE 4)
+set(EXERCISE 5)
 
 add_executable(learningc chapters/${CHAPTER}/exercises/${EXERCISE}.c)
 #target_link_libraries(learningc m) # Required for 2-3

chapters/2/exercises/5.c

@@ -0,0 +1,19 @@
+#include <stdio.h>
+int any(char s1[], char	s2[]);
+int main() {
+	printf("%i\n",any("tester","r"));
+	return 0;
+}
+
+int any(char s1[], char	s2[]) {
+	int i,j,k,s; // i is writing position and k is reading position
+	for (i = 0, k = 0; s1[k] != '\0'; k++) {
+		for (s = 0, j = 0; s2[j] != '\0'; j++) {
+			// We check if we have a disallowed character and break if it is the case
+			if (s1[k] == s2[j]) {
+				return ++k;
+			}
+		}
+	}
+	return -1;
+}