Download std string .h

Otherwise, the allocator is Alloc. The controlled sequence is initialized to a copy of the operand sequence specified by the remaining operands. A constructor without an operand sequence specifies an empty initial controlled sequence.

A random-access iterator that addresses the first element of the sequence or just beyond the end of an empty sequence. A pointer to the C-style version of the invoking string. The returned C-style string shouldn't be modified, which could invalidate the pointer to the string, or deleted, as the string has a limited lifetime and is owned by the class string. Returns the largest number of elements that could be stored in a string without increasing the memory allocation of the string.

The member function returns the storage currently allocated to hold the controlled sequence, a value at least as large as size. Typically, it's used along with the auto type deduction keyword, as shown in the following example.

In the example, consider Container to be a modifiable non- const container of any kind that supports begin and cbegin. Returns a const iterator that addresses the location just beyond the last element in a range. In the example, consider Container to be a modifiable non- const container of any kind that supports end and cend.

Does a case-sensitive comparison with a specified string to determine if the two strings are equal or if one is lexicographically less than the other. A negative value if the operand string is less than the parameter string; zero if the two strings are equal; or a positive value if the operand string is greater than the parameter string.

The compare member functions compare either all, or part, of the parameter and operand strings depending on which in used. A type that provides a random-access iterator that can access and read a const element in the string. Pointers that are declared const must be initialized when they're declared. Const pointers always point to the same memory location and may point to constant or non-constant data.

A type that provides a reference to a const element stored in a string for reading and performing const operations. A type that provides a random-access iterator that can read any const element in the string. Copies at most a specified number of characters from an indexed position in a source string to a target character array. This method is potentially unsafe, as it relies on the caller to check that the passed values are correct. A reverse iterator that points just beyond the end of the string.

The position designates the beginning of the reverse string. Returns a const iterator that addresses the location succeeding the last element in a reversed string. A const reverse iterator that addresses the location succeeding the last element in a reversed string the location that had preceded the first element in the unreversed string.

A pointer to the first element of the null-terminated array containing the contents of the string. Each element in the range corresponds to the current data in the string. If you modify the contents of the string returned by the const overload of data , the behavior is undefined. You also get undefined behavior if the terminal null character is changed to any other value.

The returned pointer may be invalidated if a non- const reference to the string is passed to a standard library function. It can also be invalidated by a call to a non- const member function. Calls to members at , back , begin , end , front , rbegin , rend , and operator[] don't invalidate the pointer.

A type that provides the difference between two iterators that refer to elements within the same string. The signed integer type describes an object that can represent the difference between the addresses of any two elements in the controlled sequence.

Returns a random-access iterator that addresses the location succeeding the last element in a string. The value returned by end shouldn't be dereferenced. Note: to print the std::string with Serial. This is similar to when you want to use printf. Also, do not confuse std::string with the Arduino String object , those two are completely different.

Before you use std::cout, you have to tell the Arduino which hardware serial interface it needs to use. You have experimented with vector, iterator, string, cout. Those are very common in any Cpp code using the STL. If you have a doubt about an STL element, or a function inside an element, this might help you.

If yes, subscribe to receive exclusive content and special offers! Give us more details about what you want to learn! Arduino Programming For Beginners. Important, please read!!! Searches for the first occurrence of the character c an unsigned char in the string pointed to, by the argument str. Compares string str1 to str2. Calculates the length of the initial segment of str1 which consists entirely of characters not in str2.

Searches an internal array for the error number errnum and returns a pointer to an error message string. Finds the first character in the string str1 that matches any character specified in str2. Searches for the last occurrence of the character c an unsigned char in the string pointed to by the argument str. Calculates the length of the initial segment of str1 which consists entirely of characters in str2.

Finds the first occurrence of the entire string needle not including the terminating null character which appears in the string haystack.