CMPT 120, Course Exercise 3

Using the contents of Lecture 9, write a function first_pos_of_char(astring, achar) that returns the first position of the character contained in achar, in the string astring.

If the character is not present in the string, the function should return -1.

Remember that positions are indexed in 0.

Examples:

• first_pos_of_char("hello", "l") returns 2 because "l" appears two times, in positions 2 and 3, and position 2 is the position of the first occurrence.
• first_pos_of_char("hello", "o") returns 4 because "o" appears at position 4.
• first_pos_of_char("hello", "a") returns -1 because "a" does not appear in "hello".

Submissions should be made on Coursys.