string b="abcde"; string name ="选手"+b[1];
时间: 2023-12-22 14:05:50 浏览: 36
The code you provided is incomplete and the second line is unrelated to the first line. However, assuming you want to access the second character in the string b, the correct code would be:
```cpp
string b = "abcde";
string name = "选手";
char secondChar = b[1]; // secondChar will be 'b'
```
Note that string indexing starts from 0, so b[1] corresponds to the second character in the string (which is 'b' in this case). Also, I included a third line to store the second character in a separate variable called secondChar.
相关问题
String s = "abcde" 可以直接StringBuilder sb = new StringBuilder(s)吗?
可以的,可以通过将String类型的变量传递给StringBuilder构造方法来创建一个新的StringBuilder对象。具体代码如下:
```
String s = "abcde";
StringBuilder sb = new StringBuilder(s);
```
以上代码会创建一个内容为"abcde"的StringBuilder对象。可以在此基础上使用StringBuilder的方法来修改字符串。
a=10 b=abcde c=3.1415926 print("a=%d,b=%s,c=%.2f"%(a,b,c))
输出结果为:
a=10, b=abcde, c=3.14
解释一下代码:
- 第一行定义了三个变量 a、b、c,分别赋值为 10、'abcde'、3.1415926。
- 第二行使用了字符串格式化输出的方式,其中 %d 表示输出整型,%s 表示输出字符串,%.2f 表示输出浮点数,保留两位小数。
- 输出的内容为 a=10, b=abcde, c=3.14。