count letter in string
#include<stdio.h> #include<string.h> int main() { char c; char s[100]; scanf("%c", &c); scanf("%s", s); int count = 0; int len = strlen(s); for (int i = 0; i < len; i++) { if (s[i] == c) { count++; } } printf("%d", count); return 0; }
count characters in string
# count characters iterative def count_chars(s) count = Hash.new(0) s.split("").each do |x| count[x] += 1 end count end # count characters functional s.chars.map {|c| [c, s.chars.count(c)] }.to_h
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