Java面向对象 C语言字符串常量

1.

（1）.

package liujiawei;public class Phone {String brand;double price;public void call(){System.out.println("手机打电话");}public void play(){System.out.println("手机打游戏");}
}

public class phonetest {public static void main(String[] args) {phone p=new phone();p.brand="vivo";p.price= Double.parseDouble("4999");System.out.println(p.brand);System.out.println(p.price);p.call();p.play();}
}

（2）.

public class girlfriend{
String name;
double high;
String face;
String age;
public void sleep(){System.out.println("女朋友在睡觉");}public void study(){System.out.println("女朋友在学习");}
}

public static void main(String[] args) {girlfriend f = new girlfriend();f.name = "fanwenshuo";f.high = Double.parseDouble("17.2");f.face = "keai";f.age="18";f.sleep();f.study();System.out.println(f.face);System.out.println(f.name);System.out.println(f.high);System.out.println();
}

2.

#if 1
#include<stdio.h>
#include<string.h>
int main(void)
{
    printf("%s\n", "abcEFG");//%s输出字符串
    printf("占据的字节数：%d\n", sizeof("abcEFG"));//最后有0的位置  即尺寸
    printf("长度：%d\n",strlen("abcEFG"));//字符串的长度
    printf("占据的字节数：%d\n", sizeof("abc\0EFG"));//7+1
    printf("长度：%d\n", strlen("abc\0EFG"));//长度：遇到第一个\0
    printf("占据的字节数：%d\n", sizeof(""));//1
    printf("长度：%d\n", strlen(""));//由一对双引号括起来0个或多个字符   //0
    return 0;
}
#endif