ZZULIOJ 1150: Counting integers, Java

ZZULIOJ 1150: Counting integers, Java

Question description

Xiao Ming's teacher gave Xiao Ming a question: count how many numbers appear in an article, please help him.

enter

Enter a string consisting of spaces, English letters, and numbers, ending with a carriage return, and the length is less than 1000.

output

Output the number of integers (not the number of numeric characters).

Sample inputCopy

365grh 27ha578

Sample outputCopy

3

hint

注意：010是两个数字，0和10

import java.io.*;

public class Main {
    
    
    public static void main(String[] args) throws IOException {
    
    
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        String str = bf.readLine();
        int sum = 0;
        boolean ok = false;
        for (int i = 0; i < str.length(); i++) {
    
    
            char ch = str.charAt(i);
            if (ch == '0' && !ok) {
    
    
                sum++;
            }
            if (ch > '0' && ch <= '9' && !ok) {
    
    
                sum++;
                ok = true;
            }
            if (ch == ' ' || ch > '9') {
    
    
                ok = false;
            }
        }
        bw.write(sum + "\n");
        bw.close();
    }
}