Improved output of task 4.07

ch_4/task_07/main.c

@@ -83,8 +83,12 @@ int main (void) {
     /* Output the resulting amount of coins */
     printf("\nFor a deposit of %3.2fEUR you get ...\n",cash);
     for (int i=0; i<5; i++) {
+        /* Check if there are coins of the current value */
+        if (coins[i] > 0) {
+            /* Print the current number of coins */
             printf("... %d coins of value %1.2fEUR\n",coins[i],((double)coin_value[i]/10.0));
         }
+    }
     
     /* Notify the user about the termination of the program */
     printf("\nThe program will now be terminated...\n");