diff --git a/du4/program.c b/du4/program.c
index 7badfce..1ab1049 100644
--- a/du4/program.c
+++ b/du4/program.c
@@ -3,28 +3,27 @@
 #include <string.h>
 #include <ctype.h>
 
-int call( double A,  double B,  double C, char AC){
-     double cC=(double)C;
-    if(AC=='/'&&B==0 || AC==('+'||'-'||'*'||'-')){
-        return printf("CHYBA\n");
-    }
-    else if(AC=='+'){
-        if(A+B==C || C==cC)return printf("OK\n");
-        return printf("ZLE\n");
-    }
-    if(AC=='-'){
-        if(A-B==C)return printf("OK\n");
-        return printf("ZLE\n");
-    }
-    if(AC=='*'){
-        if(A*B==C)return printf("OK\n");
-        return printf("ZLE\n");
-    }
-    if(AC=='/'){
-        if(A/B==C || A/B==cC || C==cC)return printf("OK\n");
-        return printf("ZLE\n");
-    }
-    return printf("CHYBA\n");
+char add(double A, double B, double C,char AC){
+    if(A+B==C)return printf("OK\n");
+    printf("%lf",A+B);
+    return printf("ZLE\n"); 
+}
+char subtr(double A, double B, double C,char AC){
+    if(A-B==C)return printf("OK\n");
+    printf("%lf",A-B);
+    return printf("ZLE\n"); 
+}
+char multi(double A, double B, double C,char AC){
+    if(A*B==C)return printf("OK\n");
+    printf("%lf",A*B);
+    return printf("ZLE\n"); 
+}
+char divi(double A, double B, double C,char AC){
+    float CC=A/B;
+    printf("%f",CC);
+    if(CC==C || A/B==C)return printf("OK\n");
+    printf("%lf",A/B);
+    return printf("ZLE\n"); 
 }
 
 int main()
@@ -42,11 +41,12 @@ for(int i=0;el!='\n';i++){
     str[ind]=el;
     ind++;
 }
-//134.5␣/␣6.7␣=␣20.07462686567164
-//scanf("%s",str);
 sscanf(str,"%lF%c%lF=%lF ",&a,&ac,&b,&c);
-//printf("\n%Lf %c %Lf =%Lf ",a,ac,b,c);
-call(a,b,c,ac);
+if(ac=='+')add(a,b,c,ac);
+if(ac=='-')subtr(a,b,c,ac);
+if(ac=='*')multi(a,b,c,ac);
+if(ac=='/')divi(a,b,c,ac);
     return 0;
 }
 
+