Need help with C coding, making each letter an integer

Second, scan in an integer. This integer is the 'index' that we will use to determine which letter of the alphabet to print. The integer entered will be a number between 0 and 25 (inclusive). This means that index 0 corresponds to , index 1 corresponds to and so on till we reach index 25 which corresponds to int index; printf("Index: "); scanf("\%d", \&index)