如题:http://acm.hdu.edu.cn/showproblem.php?pid=2844 Problem Description Whuacmers use coins.They have coins of value A1,A2,A3...An Silverland dollar. One day Hibix opened purse and
1. letterCounting.cpp Write a function that countsthe number of occurrences of a pair of letters in a string. Then write a programthatreads a pair and a string to test the function. Blanks