如何将字符串的字符转换成一系列的int类型?

I am trying to take the user's input and convert it into an array of ints. The problem is that when I choose 4 numbers, e.g. 2463 the output for the string is correct, but the output for the int array is incorrect and seems to be the number chosen + 48.I am trying to take the user's input and conver