EDIT: cleanup

ex1/ex1.c

@@ -4,8 +4,7 @@
 #include <stdlib.h>
 
 
-int main(int argc, char **argv) {
-	bool first = true;
+int main() {
 	int decnum = 0;
 	int dectot = 0;
 	int prev, next;
@@ -18,6 +17,6 @@ int main(int argc, char **argv) {
 		}
 		prev = next;
 	}
-	printf("\n%d %d\n\n", decnum, dectot);
+	printf("\n%d %d\n", decnum, dectot);
 	return EXIT_SUCCESS;
 }

ex2/ex2.c

@@ -93,7 +93,7 @@ void list_print(const list *ll) {
 }
 
 
-int main(int argc, char **argv) {
+int main() {
 	int n;
 	list ll = list_create();
 	for (int i = 0; i < 4; ++i) {

ex4/ex4.c

@@ -4,7 +4,7 @@
 #include <stdlib.h>
 
 
-int main(int argc, char **argv) {
+int main() {
 	size_t size = 0;
 	scanf("%lud", &size);
 	int px[size];