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 s;
int a[128] = { 0 };
int nums = 0;
cin >> s;
for (int i = 0; i < s.length(); i++) {
if (a[s[i]] == 0) {
a[s[i]] = 1;
}
}
for (int i = 0; i < 128; i++) {
if (a[i] == 1) {
nums++;
}
}
cout<<nums;
}
// 64 位输出请用 printf("%lld")
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