在 C++ 中从字符串查找总共的年数
在本教程中,我们将讨论一个从字符串查找不同年份总数的程序。
为此,我们将提供一个包含 'DD-MM-YYYY' 格式日期的字符串。我们的任务是查找给定字符串中提到的不同年份的数量。
实例
#include <bits/stdc++.h> using namespace std; //calculating the distinct years mentioned int calculateDifferentYears(string str) { unordered_set<string> differentYears; string str2 = ""; for (int i = 0; i < str.length(); i++) { if (isdigit(str[i])) { str2.push_back(str[i]); } if (str[i] == '-') { str2.clear(); } if (str2.length() == 4) { differentYears.insert(str2); str2.clear(); } } return differentYears.size(); } int main() { string sentence = "I was born on 22-12-1955." "My sister was born on 34-06-2003 and my mother on 23-03-1940."; cout << calculateDifferentYears(sentence); return 0; }
输出
3
广告