7 files changed, 9 insertions, 3 deletions
diff --git a/charf.c b/charf.c
index 537f28a..01c3087 100644
--- a/charf.c
+++ b/charf.c
@@ -3,6 +3,7 @@
 #include <math.h>
 //for multithreading
 #include <pthread.h>
+#include <stdbool.h>
 
 #define DOUBLEMODE 0
 #define DOUBLEERRORMODE 1
diff --git a/double-error.c b/double-error.c
index 672956f..e166ec0 100644
--- a/double-error.c
+++ b/double-error.c
@@ -2,6 +2,7 @@
 #include <math.h>
 #include <stdio.h>
 #include <float.h>
+#include <stdbool.h>
 
 #define EPS 2*DBL_EPSILON 
 
diff --git a/double-error.h b/double-error.h
index bacc8e7..84d118a 100644
--- a/double-error.h
+++ b/double-error.h
@@ -1,3 +1,5 @@
+#include <stdbool.h>
+
 typedef struct {double v; double e;} double_error;
 
 double_error int_to_valuetype(int);
diff --git a/double.c b/double.c
index 1572759..d7f140f 100644
--- a/double.c
+++ b/double.c
@@ -1,6 +1,7 @@
 #include <stdlib.h>
 #include <math.h>
 #include <stdio.h>
+#include <stdbool.h>
 
 double int_to_valuetype(int i){ return (double) i; }
 
diff --git a/double.h b/double.h
index 9a26970..606c8af 100644
--- a/double.h
+++ b/double.h
@@ -1,3 +1,5 @@
+#include <stdbool.h>
+
 double int_to_valuetype(int);
 
 double int_to_exptype(double);
diff --git a/ratio.c b/ratio.c
index 4b5c56b..e23aabd 100644
--- a/ratio.c
+++ b/ratio.c
@@ -3,6 +3,7 @@
 #include <math.h>
 #include <limits.h>
 #include <float.h>
+#include <stdbool.h>
 
 typedef unsigned long long num;
 
diff --git a/ratio.h b/ratio.h
index 1f54781..6c6469d 100644
--- a/ratio.h
+++ b/ratio.h
@@ -1,6 +1,4 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
+#include <stdbool.h>
 
 typedef struct {bool s; unsigned long long n; unsigned long long d;} rational;