package homework_1;

public class Pancount1 {
	/*反转方法*/
	public static void swap(char[] c, int i, int j) {
		while (i < j) {
			char tmp = c[j];
			c[j] = c[i];
			c[i] = tmp;
			i++;
			j--;

		}
	}

	public static void main(String[] args) {
		//定义字符串
		String str = "I am dxw,I like study.Java!";
		char[] ch = str.toCharArray();
		// 1、反转字符串
		swap(ch, 0, ch.length - 1);
		// 2、对每个单词以" "或符号为分割点进行字符反转操作
		int start = 0;
		for (int i = 1; i < ch.length; i++) {
			if (ch[i] == ' ' || ((int) ch[i] >= 34 && (int) ch[i] <= 47)) {
				swap(ch, start, i - 1);
				start = i + 1;
			}
		}
		// 3、将符号转化为' '.
		for (int i = 0; i < ch.length; i++) {
			if (((int) ch[i] >= 33 && (int) ch[i] <= 47)) {
				ch[i] = ' ';
			}
		}
		//4、输出反转后的字符串
		for(int i=0;i<ch.length;i++) {
			System.out.print(ch[i]);
		}
	}
}