diff --git a/du4/bodya.c b/du4/program.c
similarity index 94%
rename from du4/bodya.c
rename to du4/program.c
index 827645b..f3e8427 100644
--- a/du4/bodya.c
+++ b/du4/program.c
@@ -1,62 +1,62 @@
-#include <stdio.h>
-#include<string.h>
-#include<stdlib.h>
-char* compactString(char *src,int leng) {
-    char *new_str = (char*)calloc(leng+1,sizeof(char));
-    int k=0;
-    for(int i=0;i<leng;i++){
-        if(src[i]!=' '){
-            new_str[k] = src[i];
-            k++;
-        }
-    }
-    return new_str;
-}
-
-
-
-double operation(double first,double second,char c){
-    if(c=='*'){
-        return first*second;
-    }
-    else if(c =='-'){
-        return first-second;
-    }
-    else if(c=='/'){
-        return first/second;
-    }
-    return first+second;
-}
-
-
-
-int main()
-{
-    char str[100];
-    memset(str,0,100);
-    fgets(str,100,stdin);
-    char *new_str = compactString(str,strlen(str));
-    printf("%s\n",new_str);
-    double first =-5,second =-5,res=-5;
-    char c='E';
-    sscanf(new_str,"%lf%c%lf%*[=]%lf",&first,&c,&second,&res);
-    printf("%lf %lf %lf",first,second,res);
-    
-    
-    
-    
-    if(c=='E'||first==-5||second==-5||res==-5){
-        printf("CHYBA\n");
-        return 0;
-    }
-    double my_res = operation(first,second,c);
-    if(my_res==res){
-        printf("OK\n");
-    }
-    else{
-        printf("ZLE\n");
-    }
-    
-    
-    return 0;
-}
+#include <stdio.h>
+#include<string.h>
+#include<stdlib.h>
+char* compactString(char *src,int leng) {
+    char *new_str = (char*)calloc(leng+1,sizeof(char));
+    int k=0;
+    for(int i=0;i<leng;i++){
+        if(src[i]!=' '){
+            new_str[k] = src[i];
+            k++;
+        }
+    }
+    return new_str;
+}
+
+
+
+double operation(double first,double second,char c){
+    if(c=='*'){
+        return first*second;
+    }
+    else if(c =='-'){
+        return first-second;
+    }
+    else if(c=='/'){
+        return first/second;
+    }
+    return first+second;
+}
+
+
+
+int main()
+{
+    char str[100];
+    memset(str,0,100);
+    fgets(str,100,stdin);
+    char *new_str = compactString(str,strlen(str));
+    printf("%s\n",new_str);
+    double first =-5,second =-5,res=-5;
+    char c='E';
+    sscanf(new_str,"%lf%c%lf%*[=]%lf",&first,&c,&second,&res);
+    printf("%lf %lf %lf",first,second,res);
+    
+    
+    
+    
+    if(c=='E'||first==-5||second==-5||res==-5){
+        printf("CHYBA\n");
+        return 0;
+    }
+    double my_res = operation(first,second,c);
+    if(my_res==res){
+        printf("OK\n");
+    }
+    else{
+        printf("ZLE\n");
+    }
+    
+    
+    return 0;
+}