53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
// 写一个程序，将 24 小时格式时间转换为 12 小时格式。定义一个名为 TimeMistake 的异常类，处理用户输入的非法时间，比如 10:65 或者无效字符。
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#include <bits/stdc++.h>
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using namespace std;
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class TimeMistake {
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string message;
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public:
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TimeMistake(string msg) { message = msg; }
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string getMessage() { return message; }
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};
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void test() {
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cout << "Please enter a time in 24-hour format (such as 14:30): ";
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string input;
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cin >> input;
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if (input.length() != 5 || input[2] != ':')
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throw TimeMistake("Invalid time format");
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else {
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int hour = stoi(input.substr(0, 2));
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int min = stoi(input.substr(3, 2));
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if (hour < 0 || hour > 23 || min < 0 || min > 59)
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throw TimeMistake("Invalid time value");
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bool am = true;
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if (hour > 12) {
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am = false;
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hour -= 12;
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}
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if (hour == 0)
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hour = 12;
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cout << "The converted 12 hour format time is: " << setfill('0') << setw(2) << hour << ':' << setw(2) << min << ' ';
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if (am)
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cout << "AM";
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else
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cout << "PM";
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}
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}
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void handler() {
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try {
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test();
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}
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catch (TimeMistake e) {
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cerr << "An error occurred: " << e.getMessage() << endl;
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}
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}
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int main() {
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handler();
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return 0;
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} |