C++基础---string类的replace

1. string类的replace

1.1 string：string& replace (size_t pos, size_t len, const string& str);

原型：string& replace (size_t pos, size_t len, const string& str);

说明：删除源字符串从下标为pos处开始的len个字符，然后在pos处插入string型字符串str。

代码示例：

#include <iostream>

#include <string>

using namespace std;
int main ()
{
string str="this is a test string.";
string str1="example";

cout<<"string& replace (size_t pos, size_t len, const string& str);"<<endl;
cout<<"源字符串  ："<<str<<endl;
str.replace(15, 6, str1);
cout<<"目标字符串："<<str<<endl;

system("pause");
return 0;
}
＝>string& replace (size_t pos, size_t len, const string& str);
源字符串  ：this is a test string.
目标字符串 ：this is a test example.

1.2 string：string& replace (const_iterator i1, const_iterator i2, const string& str);

原型：string& replace (const_iterator i1, const_iterator i2, const string& str);

说明：删除源字符串从迭代i1到i2的所有字符，然后在迭代i1处插入string型字符串str。

代码示例：

#include <iostream>

#include <string>

using namespace std;
int main ()
{
string str="this is a test string.";
string str2="example";

cout<<"string& replace (const_iterator i1, const_iterator i2, const string& str);"<<endl;
cout<<"源字符串  ："<<str<<endl;
str.replace(str.begin()+15, str.begin()+21, str2);
cout<<"目标字符串："<<str<<endl;

system("pause");
return 0;
}
＝>string& replace (const_iterator i1, const_iterator i2, const string& str);
源字符串  ：this is a test string.
目标字符串 ：this is a test example.

1.3 substring：string& replace (size_t pos, size_t len, const string& str, size_t subpos, size_t sublen = npos);

原型：string& replace (size_t pos, size_t len, const string& str, size_t subpos, size_t sublen = npos);

说明：删除源字符串从下标为pos处开始的len个字符，然后在pos处插入string型字符串str的从下标为subpos开始的sublen个字符组成的子字符串。

代码示例：

#include <iostream>

#include <string>

using namespace std;
int main ()
{
string str="this is a test string.";
string str3="this is a example";

cout<<"string& replace (size_t pos, size_t len, const string& str, size_t subpos, size_t sublen = npos);"<<endl;
cout<<"源字符串  ："<<str<<endl;
str.replace(15, 6, str3, 10, 7);
cout<<"目标字符串："<<str<<endl;

system("pause");
return 0;
}
＝>string& replace (size_t pos, size_t len, const string& str, size_t subpos, size_t sublen = npos);
源字符串  ：this is a test string.
目标字符串 ：this is a test example.

1.4 c-string：string& replace(size_t pos, size_t len, const char* s);

原型：string& replace(size_t pos, size_t len, const char* s);

说明：删除源字符串从下标为pos处开始的len个字符，然后在pos处插入char型字符串s。

代码示例：

#include <iostream>

#include <string>

using namespace std;
int main ()
{
string str="this is a test string.";

cout<<"string& replace(size_t pos, size_t len, const char* s);"<<endl;
cout<<"源字符串  ："<<str<<endl;
str.replace(15, 6, "example");
cout<<"目标字符串："<<str<<endl;

system("pause");
return 0;
}
＝>string& replace(size_t pos, size_t len, const char* s);
源字符串  ：this is a test string.
目标字符串 ：this is a test example.

1.5 c-string：string& replace(const_iterator i1, const_iterator i2, const char* s);

原型：string& replace(const_iterator i1, const_iterator i2, const char* s);

说明：删除源字符串从迭代i1到i2的所有字符，然后在迭代i1处插入char型字符串s。

代码示例：

#include <iostream>

#include <string>

using namespace std;
int main ()
{
string str="this is a test string.";

cout<<"string& replace(const_iterator i1, const_iterator i2, const char* s); "<<endl;
cout<<"源字符串  ："<<str<<endl;
str.replace(str.begin()+15, str.begin()+21, "example");
cout<<"目标字符串："<<str<<endl;

system("pause");
return 0;
}
＝>string& replace(const_iterator i1, const_iterator i2, const char* s);
源字符串  ：this is a test string.
目标字符串 ：this is a test example.

1.6 buffer：string& replace(size_t pos, size_t len, const char* s, size_t n);

原型：string& replace(size_t pos, size_t len, const char* s, size_t n);

说明：删除源字符串从下标为pos处开始的len个字符，然后在pos处插入char型字符串s前n个字符组成的子字符串。

代码示例：

#include <iostream>

#include <string>

using namespace std;
int main ()
{
string str="this is a test string.";

cout<<"string& replace(size_t pos, size_t len, const char* s, size_t n); "<<endl;
cout<<"源字符串  ："<<str<<endl;
str.replace(15, 6, "example is example", 7);
cout<<"目标字符串："<<str<<endl;

system("pause");
return 0;
}
＝>string& replace(size_t pos, size_t len, const char* s, size_t n);
源字符串  ：this is a test string.
目标字符串 ：this is a test example.

1.7 buffer：string& replace (const_iterator i1, const_iterator i2, const char* s, size_t n);

原型：string& replace (const_iterator i1, const_iterator i2, const char* s, size_t n);

说明：删除源字符串从迭代i1到i2的所有字符，然后在迭代i1处插入char型字符串s前n个字符组成的子字符串。

代码示例：

#include <iostream>

#include <string>

using namespace std;
int main ()
{
string str="this is a test string.";

cout<<"string& replace (const_iterator i1, const_iterator i2, const char* s, size_t n);"<<endl;
cout<<"源字符串  ："<<str<<endl;
str.replace(str.begin()+15, str.begin()+21, "example is example", 7);
cout<<"目标字符串："<<str<<endl;

system("pause");
return 0;
}
＝>string& replace (const_iterator i1, const_iterator i2, const char* s, size_t n);
源字符串  ：this is a test string.
目标字符串 ：this is a test example.

1.8 fill：string& replace(size_t pos, size_t len, size_t n, char c);

原型：string& replace(size_t pos, size_t len, size_t n, char c);

说明：删除源字符串从下标为pos处开始的len个字符，然后在pos处插入n个字符c。

代码示例：

#include <iostream>

#include <string>

using namespace std;
int main ()
{
string str="this is a test string.";

cout<<"string& replace(size_t pos, size_t len, size_t n, char c);"<<endl;
cout<<"源字符串  ："<<str<<endl;
str.replace(14, 8, 1, '!');
cout<<"目标字符串："<<str<<endl;

system("pause");
return 0;
}
＝>string& replace(size_t pos, size_t len, size_t n, char c);
源字符串  ：this is a test string.
目标字符串 ：this is a test!

1.9 fill：string& replace (const_iterator i1, const_iterator i2, size_t n, char c);

原型：string& replace (const_iterator i1, const_iterator i2, size_t n, char c);

说明：删除源字符串从迭代i1到i2的所有字符，然后在迭代i1处插入n个字符c。

代码示例：

#include <iostream>

#include <string>

using namespace std;
int main ()
{
string str="this is a test string.";

cout<<"string& replace (const_iterator i1, const_iterator i2, size_t n, char c);"<<endl;
cout<<"源字符串  ："<<str<<endl;
str.replace(str.begin()+14, str.begin()+22, 1, '!');
cout<<"目标字符串："<<str<<endl;

system("pause");
return 0;
}
＝>string& replace (const_iterator i1, const_iterator i2, size_t n, char c);
源字符串  ：this is a test string.
目标字符串 ：this is a test!

1.10 range：template < class InputIterator>string& replace(const_iterator i1, const_iterator i2, InputIterator first, InputIterator last);

原型：template < class InputIterator>string& replace(const_iterator i1, const_iterator i2, InputIterator first, InputIterator last);

说明： Copies the sequence of characters in the range [first,last), in the same order.

代码示例：

#include <iostream>

#include <string>

using namespace std;
int main ()
{
string str="this is a test string.";
string str4="this is a example";

cout<<"template < class InputIterator>string& replace(const_iterator i1, const_iterator i2, InputIterator first, InputIterator last); "<<endl;
cout<<"源字符串  ："<<str<<endl;
str.replace(str.begin()+15, str.begin()+21, str4.begin()+10, str4.begin()+17);
cout<<"目标字符串："<<str<<endl;

system("pause");
return 0;
}
＝>template < class InputIterator>string& replace(const_iterator i1, const_iterator i2, InputIterator first, InputIterator last);
源字符串  ：this is a test string.
目标字符串 ：this is a test example.

参考文献：

[1] 网络资源： http://www.cplusplus.com/reference/string/string/string/