diff --git a/du4/program.c b/du4/program.c
index ef75ae8..48403fe 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -14,12 +14,12 @@ int main() {
     char* koniec_cisla = NULL;
     char* zaciatok_cisla = znaky;
     //char* koniec_pola;
-    float cislo = 0.0;
-    float a = 0;
-    float b = 0;
-    float c = 0;
+    double cislo = 0.0;
+    double a = 0;
+    double b = 0;
+    double c = 0;
     int counter = 0;
-    float sr= 0;
+    double sr= 0;
     int p = 0;
     while ((r = fgets(znaky, LINE_SIZE, stdin)) != NULL) {
 	if(znaky[0] == '\n'){