C语言合法标识符
Time Limit: 2000/1000 MS (Java/Others)Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 27809Accepted Submission(s): 11163
Problem Description
输入一个字符串,判断其是否是C的合法标识符。
Input
Output
Sample Input
3 12ajf fi8x_a ff ai_2
Sample Output
no yes nopackage hdu2024; import java.io.BufferedInputStream; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner cin = new Scanner(new BufferedInputStream(system.in)); String s = "^[a-zA-Z|$|_]\\w+$"; int count = cin.nextInt(); String str = cin.nextLine(); for (int i = 0; i < count; i++) { str = cin.nextLine(); if (str.matches(s)) { System.out.println("yes"); } else { System.out.println("no"); } } } }