diff --git a/cv3/program.c b/cv3/program.c
index 8ec3532..33fb3ec 100644
--- a/cv3/program.c
+++ b/cv3/program.c
@@ -29,63 +29,70 @@ int main(){
     memset(&myStack,0,sizeof(struct stack));
     while(1){
         ptr = fgets(char_value, STACK_SIZE-1, stdin);
-        if(ptr != NULL ){
+        if(ptr != NULL){
+            if(char_value[0] == '\n'){
+                puts("no input");
+                break;
+            }
             if(char_value[0] == '0'){
                 push_stack(&myStack,0);
                 print_stack(&myStack);
                 printf("\n");
                 continue;
             }
-            float_value = strtof(char_value, NULL);
-            if(float_value == 0){
-                if(char_value[0] == '+'){
+   
+            if(char_value[0] == '+'){
                     float a = pop_stack(&myStack);
                     float b = pop_stack(&myStack);                    
                     float c = a+b;
                     push_stack(&myStack, c);
                     print_stack(&myStack);
                     printf("\n");
-                }
-                if(char_value[0] == '-'){
+            }else if(char_value[0] == '-'){
                     float a = pop_stack(&myStack);
                     float b = pop_stack(&myStack);                    
                     float c = b-a;
                     push_stack(&myStack, c);
                     print_stack(&myStack);
                     printf("\n");
-                }
-                if(char_value[0] == '*'){
+                }else if(char_value[0] == '*'){
                     float a = pop_stack(&myStack);
                     float b = pop_stack(&myStack);                    
                     float c = a*b;
                     push_stack(&myStack, c);
                     print_stack(&myStack);
                     printf("\n");
-                } 
-                if(char_value[0] == '/'){
+                } else if(char_value[0] == '/'){
                     float a = pop_stack(&myStack);
                     if(a == 0){
                         printf("division by zero\n");
-                        break;
+                    }else{
+                        float b = pop_stack(&myStack);                    
+                        float c = b/a;
+                        push_stack(&myStack, c);
+                        print_stack(&myStack);
+                        printf("\n");
                     }
-                    float b = pop_stack(&myStack);                    
-                    float c = b/a;
-                    push_stack(&myStack, c);
-                    print_stack(&myStack);
-                    printf("\n");
-                }
- 
-            }else { 
-                
-                push_stack(&myStack, float_value);
+                } else {
+            float_value = strtof(char_value, NULL);
+            if(float_value == 0){
+                puts("bad input");
+                break;
+            } else {
+                push_stack(&myStack,float_value);
                 print_stack(&myStack);
                 printf("\n");
+                continue;
+            } 
             }
-        }else{
-            puts("no input");
-            break;
-        }
-    } 
+            }else { 
+               //push_stack(&myStack, float_value);
+               //print_stack(&myStack);
+               //printf("\n");
+                puts("no input");
+                break;
+            }
+        } 
 
 
     return 0;