Complete HW3

++ Programs
+- C Files

Homework3/jump_the_five.c

@@ -20,7 +20,33 @@ int main(int argc, char *argv[])
 {
     // define local variables
     // do calculations
-    // display results
+    // check to see if there are valid phone numbers (7 or 10 digits)
+    if(argc == 8 || argc == 11)
+    {
+        // iterate through the arguments in list
+        for(int i = 1; i < argc; i++)
+        {
+            // define and get the number using atoi
+            int num = atoi(argv[i]);
+            // check to see if the number is 5/0, and print the opposite.
+            if(num == 5)
+            {
+                printf("0 ");
+            }
+            else if(num == 0)
+            {
+                printf("5 ");
+            }
+            else
+            {
+                // otherwise, subtract the number from ten to get "the opposite"
+                printf("%i ", 10 - num);
+            }
+        }
+        printf("\n");
+        return 0;
+    }
+    printf("You must enter 7 or 10 digits as a valid phone number.\n");
     // return success
     return 0;
-}
+}