C++/String/string replace — различия между версиями
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Admin (обсуждение | вклад) м (1 версия: Импорт контента...) |
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Текущая версия на 13:25, 25 мая 2010
Содержание
Demonstrate insert(), erase(), and replace().
<source lang="cpp">
- include <iostream>
- include <string>
using namespace std;
int main() {
string str1("A"); string str2("B"); cout << "Initial strings:\n"; cout << "str1: " << str1 << endl; cout << "str2: " << str2 << "\n\n"; str1.insert(6, str2); cout << str1 << "\n\n"; str1.erase(6, 9); cout << str1 <<"\n\n"; str1.replace(7, 8, str2); cout << str1 << endl; return 0;
}
</source>
Replace all spaces with period
<source lang="cpp">
- include <iostream>
using std::cout; using std::endl;
- include <string>
using std::string; int main() {
string string1( "abc edfgh ijk lmno pqr stu vw xyz" ); cout << "Original string:\n" << string1 << endl << endl; int position = string1.find( " " ); // find first space // while ( position != string::npos ) { string1.replace( position, 1, "." ); position = string1.find( " ", position + 1 ); } cout << string1 << "\n\nAfter second replacement:\n"; return 0;
} /* Original string: abc edfgh ijk lmno pqr stu vw xyz abc.edfgh.ijk.lmno.pqr.stu.vw.xyz After second replacement:
*/ </source>
string.replace()
<source lang="cpp">
- include <iostream>
- include <string>
using namespace std; int main() {
string str1("String handling C++ style."); string str2("STL Power"); cout << "Initial strings:\n"; cout << "str1: " << str1 << endl; cout << "str2: " << str2 << "\n\n"; // demonstrate replace cout << "Replace 8 characters in str1 with str2:\n"; str1.replace(7, 8, str2); cout << str1 << endl; return 0;
}
/*
Initial strings: str1: String handling C++ style. str2: STL Power Replace 8 characters in str1 with str2: String STL Power C++ style.
*/ </source>
string.replace( position, 2, ";123", 5, 2 )
<source lang="cpp">
- include <iostream>
using std::cout; using std::endl;
- include <string>
using std::string; int main() {
string string1( "abc edfgh ijk lmno pqr stu vw xyz" ); cout << "Original string:\n" << string1 << endl << endl; int position = string1.find( "." ); // find first period while ( position != string::npos ) { string1.replace( position, 2, "12345;;123", 5, 2 ); position = string1.find( ".", position + 1 ); } cout << string1 << endl; return 0;
} /* Original string: abc edfgh ijk lmno pqr stu vw xyz abc edfgh ijk lmno pqr stu vw xyz
*/ </source>