C

DeitelC/Chapter3/HowMany9.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main(void){
+    int counter = 0;
+    int data = 0;
+    int nine = 9;
+    int lastData;
+
+    printf("Enter integer!: ");
+    scanf("%d", &data);
+    while(data > 0){
+        lastData = data % 10;
+        if (lastData == 9) {
+            counter++;
+            data /= 10;
+        } else {
+            data /= 10;
+        }
+    }
+    printf("%d\n", counter);
+}