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C??????????????

??????????????????????????C???C++?Java?????????????????????????????

C????

?C??????long int????????long int????????????2^32-1????4GB???????C??????????

#include 
   
    int main() {    long int age;    scanf("%ld", &age);    long int b = 31560000;    printf("%ld", age * b);    // %ld?????????????????????    // ????age???????????    // ?age????????????}
   

???

• long int????int??????????????
• %ld?????????long int??????%d?????2^31-1?2^63-1????

C++????

?C++????long long????????long long????2^63-1??long int??????C++????????

#include 
   
    #include 
    
     using namespace std;int main() {    long long age;    cin >> age;    cout << age * 31560000L;    // ??`long long`???????????    // ??????????}
    
   

???

• long long?C++??long int????????????????
• 31560000L??????????????????????

Java????

?Java????long????????long????2^63-1??C++?long long??????Java????????

import java.io.*;public class Main {    public static void main(String[] args) throws IOException {        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));        String ageStr = br.readLine();        long age = Long.parseLong(ageStr);        System.out.println(age * 31560000L);        // ??`long`????????        // ??????????    }}

???

• Java?long??????????????????
• Long.parseLong()???????????long?????????????????

?????

???????????????????????????

• C???long int???????????????????%ld????
• C++?long long???????????????????
• Java?long??????????????????????

??????????????????????????C++?Java?????????????C??????????????????????????

???????????????????????????????????

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