diff --git a/du4/program.c b/du4/program.c
index a721101..fa37904 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -5,23 +5,23 @@
 
 int call(double A, double B, double C, char AC){
     if(AC=='/'&&B==0){
-        return printf("CHYBA");;
+        return printf("CHYBA\n");;
     }
     else if(AC=='+'){
-        if(A+B==C)return printf("OK");
-        return printf("ZLE");
+        if(A+B==C)return printf("OK\n");
+        return printf("ZLE\n");
     }
     else if(AC=='-'){
-        if(A-B==C)return printf("OK");
-        return printf("ZLE");
+        if(A-B==C)return printf("OK\n");
+        return printf("ZLE\n");
     }
     else if(AC=='*'){
-        if(A*B==C)return printf("OK");
-        return printf("ZLE");
+        if(A*B==C)return printf("OK\n");
+        return printf("ZLE\n");
     }
     else if(AC=='/'){
-        if(A/B==C)return printf("OK");
-        return printf("ZLE");
+        if(A/B==C)return printf("OK\n");
+        return printf("ZLE\n");
     }    
 }