[C + +] string processing

String read-in by line

getline(cin, s1);

string deletes the specified character

Move the element with the value Val to the end, and return the Newend iterator through remove in algorithm
Use String.erase to remove elements from the newend and end ranges

s1.erase(remove(s1.begin(), s1.end(), s2[i]), s1.end());

The difference between the Find function

Find is provided in both string and algorithm.

Std::find function template

Emplate <class Inputiterator, class t>
Inputiterator Find (inputiterator First, Inputiterator last, const t& val);

Input parameters

Find iterators for scopes, and find values

return value

The first iterator that matches the element that has no matching result returns the last iterator

Std::string::find overloading

String (1)
size_t Find (const string& str, size_t pos = 0) const noexcept;
C-string (2)
size_t Find (const char* s, size_t pos = 0) const;
Buffer (3)
size_t Find (const char* s, size_t pos, size_type N) const;
Character (4)
size_t Find (char c, size_t pos = 0) const noexcept;

Input parameters

STR/S/C: The string/character to look for
POS: Looking for the starting position
N: The length of the match

return value

Returns the position of the first matching element found (size_t)
Return String::npos if not found

Output specified precision

printf ("%.2f", num)

[C + +] string processing