diff --git a/cv3/program.c b/cv3/program.c
index 214f625..03d2f10 100644
--- a/cv3/program.c
+++ b/cv3/program.c
@@ -77,8 +77,10 @@ int main() {
     char input[20];
     
     while (1) {
-        if (!fgets(input, sizeof(input), stdin)) {
-            //printf("no␣input");
+        char* a = fgets(input, sizeof(input), stdin);
+        if (a == NULL){
+        //if (!fgets(input, sizeof(input), stdin)) {
+            printf("no␣input\n");
             break;
         }