String

[Bolong Yu]

How to write a function that reverses a string but not the positions of the null terminator?

[giblit]

create a second string that is either empty and same size as the other string or set it equal to the other string. and then loop backwards and put those characters into the new string. You will also need a number counting up from 0 for the second string
eg

1 2 3 4 5 6 7 8 9 10 11 12 13 14

#include <iostream> int main ( int argc , char** argv ) { std::string str("Giblit"), str2 = str; unsigned int j = 0; for( signed int i = str.size() -1 ; i > -1; i-- ) { str2[j] = str[i]; j++; } std::cout << "Normal String: " << str << std::endl; std::cout << "Backward String: " << str2 << std::endl; }

Normal String: Giblit Backward String: tilbiG Process returned 0 (0x0) execution time : 0.191 s Press any key to continue.

[MiiNiPaa]

#include <algorithm>
/*....*/
char x[10];
std::strcpy(x, "Hello");
std::reverse(x, x + std::strlen(x));
std::cout << x;

or if you want to do it without standart library:

void reverse(char* first, char* last)
{
    while ((first != last) && (first != --last)) {
        std::swap(*first++, *last);
    }
}

@giblit there can be no null terminator in std::string.