c语言知识点CPPstring.ppt

c语言知识点CPPstring.pptstd::string
String in C++ Standard Library
std::string
Constructor 构造函数
Assign 赋值
Append 附加
Insert 插入
Concatenate 拼接
Sub string 子串
Erase 删除
Replace 替换
Compare 比较
Size 大小
Elements 元素
Find 查找
To C string C风格串
Swap 交换
I/O 输入输出
1. Constructor
string()
string(s)
string(s, pos, n)
string(p)
string(p, n)
string(n, c)
2. Assign
(s)
(s, pos, n)
(p)
(p, n)
(n, c)
x = s
x = p
x = c
3. Append
(s)
(s, pos, n)
(p)
(p, n)
(n, c)
x += s
x += p
x += c
4. Insert
(pos, s)
(pos, s, pos2, n)
(pos, p)
(pos, p, n)
(pos, n, c)
5. Concatenate
x + s
x + p
p + x
x + c
c + x
6. Sub string
(pos=0, n=npos)
NOTE: std::string::npos 表示串中字符的最大位置
.
(pos, n)
(pos)
()
string x=“abcdef”;
(2,3); // ”cde”
(2,100); // ”cdef”
(2); // “cdef”
(); // “abcdef”
7. Erase
(pos=0, n=npos)
()
.
(pos, n)
(pos)
() . ()
8. Replace
(pos, n, s)
(pos, n, s, pos2, n2)
(pos, n, p)
(pos, n, p, n2)
(pos, n, n2, c)