| string Operation | Description |
|---|---|
| string aString; | Declare aString as an empty string |
| string aString = "hi"; | Declare aString as a non-empty string |
| cin >> aString; | Read a word from cin, storing it in aString |
| cout << aString; | Display via cout the string within aString |
| getline(cin, aString); | Read a line from cin, storing it in aString |
| aString[i] | Access the character in aString whose index is i |
| aString.size() | Determine the number of characters in aString |
| aString.substr(pos,size) | Access the substring of aString consisting of size characters, starting at index pos |
| aString.replace(pos,size,newString); | Replace size characters in aString with newString, starting at index pos |
| aString.erase(pos,size); | Remove size characters from aString, starting at index pos |
| aString.insert(pos,newString); | Insert newString into aString, starting at index pos |
| aString.find(pattern, pos) | Determine the index at which pattern begins within aString, searching forward from pos |
| aString.rfind(pattern, pos) | Determine the index at which pattern begins within aString, searching backward from pos |
| aString.find_first_of(pattern, pos) | Determine the first index at which any character in pattern occurs within aString, by searching forward from pos |
| aString.find_last_of(pattern, pos) | Determine the last index at which any character in pattern occurs within aString, by searching backward from pos |
| string1 == string2 | Equality relational comparison |
| string1 != string2 | Inequality relational comparison |
| string1 < string2 | Less-than relational comparison |
| string1 > string2 | Greater-than relational comparison |
| string1 <= string2 | Less-than-or-equal relational comparison |
| string1 >= string2 | Greater-than-or-equal relational comparison |
| string1 = string2; | Make string1 a copy of string2 |
| string1 + string2 | Create a new string consisting of string1 followed by string2 |
| string1 += string2; | Append string2 to string1 |
For each of the "find" functions, if the item being sought is not present in the string, the function returns string::npos, a special constant defined in the string library.