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")
