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 cnt = 0;
while (getline(cin, s)) {
int arr[128] = {0};
for (int i = 0; i < s.size(); ++i) {
arr[s[i]] = 1; //用数组存储该ascii码是否存在于字符串中
}
for (int j = 0; j < 128; ++j) {
if (arr[j] == 1)
++cnt;
}
cout << cnt;
}
return 0;
}
查看24道真题和解析