Unfortunately there is no general answer because pound is a measurement of weight and cup is a measurement of volume. It depends on what you’re measuring.
For example: For water 1 cup = 8 fluid ounces = 8 ounces weight = 0.5 pounds. So 2 cups water weighs 1 pound. But this only works for water.
Sugar is almost the same so 2 cups sugar weighs approximately 1 pound. But for flour you have 4 cups per pound.
Many times recipes will ask you to use cups in your measuring. However, your stick of butter only tells you tablespoons and pounds. There are 2 cups of butter in one pound. If there are other items that you need to convert this same way the number of cups needed to measure as a pound will vary based on what you are measuring