题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
简洁代码
#include <iostream>
#include <set>
#include <string>
using namespace std;
int main()
{
string str;
set<char> s;
cin >> str;
for (int i = 0; i < str.size(); i++) {
if (!(str[i] >= 0 && str[i] <= 127)) { // 检验[0,127]边界
continue;
}
if (str[i] == '\n') { // 检验换行符
break;
}
s.emplace(str[i]);
}
cout << s.size();
}
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