题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
#include <iostream> using namespace std; int main() { string str; cin >> str; int cnt = 0; int a[128] = {0}; for(int i = 0; i < str.length(); i ++){ if(a[str[i]] == 0){ a[str[i]]++; } } for(int i = 0; i < 128; i ++){ cnt += a[i]; } cout << cnt << endl; return 0; } // 64 位输出请用 printf("%lld")