题解 | #计算某字符出现次数#
计算某字符出现次数
https://www.nowcoder.com/practice/a35ce98431874e3a820dbe4b2d0508b1
#include <cctype>
#include <iostream>
#include <algorithm>
#include <string>
using namespace std;
bool countC(char c);
char g_c;
int main() {
string str_s;
getline(cin, str_s);
g_c = tolower(getchar());
cout << count_if(str_s.begin(), str_s.end(), countC);
}
// 64 位输出请用 printf("%lld")
bool countC(char c){
return g_c == tolower(c);
}
