题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
#include <bits/stdc++.h>
using namespace std;
int main() {
string str;
int a[130] = {0};
int cnt = 0;
while (cin >> str) {
for (int i = 0; i < str.size(); i++) {
if (a[str.at(i)] == 0) {
a[str.at(i)] = 1;
cnt ++;
}
}
}
cout << cnt << endl;
}
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