C++ Tutorial/string/string insert — различия между версиями
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Версия 14:21, 25 мая 2010
Содержание
changing parts of string objects
#include <iostream>
#include <string>
using namespace std;
int main(){
string s1("this is a test");
string s2("is");
string s3("test");
s1.erase(0, 7);
s1.replace(9, 5, s2);
s1.replace(0, 1, "s");
s1.insert(0, s3);
s1.erase(s1.size()-1, 1);
s1.append(3, "!");
int x = s1.find(" ");
while( x < s1.size() ){
s1.replace(x, 1, "/");
x = s1.find(" ");
}
cout << "s1: " << s1 << endl;
return 0;
}Insert one string at location 10 of another string
#include <iostream>
using std::cout;
using std::endl;
#include <string>
using std::string;
int main()
{
string string1( "AAAAAAA end" );
string string2( "CCCCCCC " );
string string3( "12345678" );
string string4( "xx" );
cout << "Initial strings:\nstring1: " << string1
<< "\nstring2: " << string2 << "\nstring3: " << string3
<< "\nstring4: " << string4 << "\n\n";
// insert string2 at location 10 in string1
string1.insert( 10, string2 );
cout << "Strings after insert:\nstring1: " << string1
<< "\nstring2: " << string2 << "\nstring3: " << string3
<< "\nstring4: " << string4 << endl;
return 0;
}Initial strings: string1: AAAAAAA end string2: CCCCCCC string3: 12345678 string4: xx Strings after insert: string1: AAAAAAA enCCCCCCC d string2: CCCCCCC string3: 12345678 string4: xx
string.insert()
#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 insert()
cout << "Insert str2 into str1:\n";
str1.insert(6, str2);
cout << str1 << "\n\n";
return 0;
}Initial strings: str1: String handling C++ style. str2: STL Power Insert str2 into str1: StringSTL Power handling C++ style.
string.insert( 3, string4, 0, string::npos )
#include <iostream>
using std::cout;
using std::endl;
#include <string>
using std::string;
int main()
{
string string1( "beginning end" );
string string2( "middle " );
string string3( "12345678" );
string string4( "xx" );
cout << "Initial strings:\nstring1: " << string1
<< "\nstring2: " << string2 << "\nstring3: " << string3
<< "\nstring4: " << string4 << "\n\n";
// insert string4 at location 3 in string3
string3.insert( 3, string4, 0, string::npos );
cout << "Strings after insert:\nstring1: " << string1
<< "\nstring2: " << string2 << "\nstring3: " << string3
<< "\nstring4: " << string4 << endl;
return 0;
}Initial strings: string1: beginning end string2: middle string3: 12345678 string4: xx Strings after insert: string1: beginning end string2: middle string3: 123xx45678 string4: xx
