题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
#include <asm-generic/errno.h>
#include <iostream>
using namespace std;
int main() {
int a[128] = {0};
string str;
cin >> str;
int num = 0;
for (int i = 0; i < str.length(); i++) {
if (a[int(str[i])] != 1) {
a[int(str[i])] = 1;
num++;
}
}
cout << num;
}
既然ASKLL码范围确定，通过强制类型转换，可以用和前面题目类似的思路解决
