Created
September 15, 2015 07:38
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/* Problem 1.2: Implement a function void reverse(char* str) | |
* in C or C++, which reverses a null-terminated string. | |
* @author: Rafayel Mkrtchyan | |
* @date: 9/14/2015 | |
*/ | |
#include <iostream> | |
/* This function takes an iterative approach to problem | |
* using an O(n) speed. | |
*/ | |
void reverse_string(char* str) { | |
char* sameStr = str; | |
char temporary; | |
if (str) { | |
while(*sameStr) { | |
++sameStr; | |
} | |
--sameStr; | |
while (str < sameStr) { | |
temporary = *str; | |
*str++ = *sameStr; | |
*sameStr-- = temporary; | |
} | |
} | |
} | |
int main() { | |
std::string str = "Berkeley"; | |
char* writable = new char[str.size() + 1]; | |
std::copy(str.begin(), str.end(), writable); | |
writable[str.size()] = '\0'; | |
reverse_string(writable); | |
std::cout << writable << std::endl; | |
delete[] writable; | |
return 0; | |
} |
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