Add pragmas to remove warnings

c/cards.c

@@ -59,5 +59,5 @@ int main(void) {
   printf("Hello bostinha: " _S(1) "\n");
   printf("Cagalhao: " __S(CAGALHAO) "\n");
   printf("Cagalhao: " _S(CAGALHAO) "\n");
-  printf("Size array: %d", sizeof(pontos) / sizeof(pontos[0]));
+  printf("Size array: %ld", sizeof(pontos) / sizeof(pontos[0]));
 }

c/forkhandler.c

@@ -1,3 +1,6 @@
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wimplicit-function-declaration"
+
 #include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -20,3 +23,5 @@ int main() {
   }
   return 0;
 }
+
+#pragma GCC diagnostic pop

c/pthreadex1.c

@@ -1,3 +1,5 @@
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wimplicit-function-declaration"
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -19,3 +21,5 @@ int main() {
   }
   return 0;
 }
+
+#pragma GCC diagnostic pop

c/pthreadex4.c

@@ -1,3 +1,6 @@
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wimplicit-function-declaration"
+
 #include <pthread.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -27,3 +30,5 @@ int main() {
   printf("Hello from the main thread!\n");
   return 0;
 }
+
+#pragma GCC diagnostic pop

c/pthreadex5.c

@@ -1,3 +1,6 @@
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wimplicit-function-declaration"
+
 #include <errno.h>
 #include <pthread.h>
 #include <stdio.h>
@@ -40,3 +43,5 @@ int main() {
 
   return 0;
 }
+
+#pragma GCC diagnostic pop