Function returns value
Let us figure out what the phrases «function returns a value», «return value type» and «void function» mean.
#include <string>
#include <iostream>
std::string reverse_words(std::string str)
{
std::string rev_str = str;
int str_len = str.length();
int k = 0;
int j = 0;
for (int i = 0; i < str_len; ++i)
{
if ((str[i] == 0x20) and (str[i - 1] != 0x20))
{
for (j = 0; j < (i - k); j++)
{
rev_str[j + k] = str[i - j - 1];
}
k = i + 1;
}
else if ((str[i] == 0x20) and (str[i - 1] == 0x20))
{
++k;
}
// Check the last element of the string
if ((i == str_len - 1) and (str[i] != 0x20))
{
// if it is not a space we need to use additional reverse
for (j = 0; j <= (i - k); j++)
{
rev_str[j + k] = str[i - j];
}
}
}
for (int i = 0; i < str_len; ++i)
{
std::cout << rev_str[i];
}
return rev_str;
}
int main()
{
std::string testString1 = "Visit website www.TopBicycle.ru";
std::string testString2 = "Visit website www.HeiHei.ru ";
reverse_words(testString1);
reverse_words(testString2);
return 0;
}
The result
tisiV etisbew ur.elcyciBpoT.www tisiV etisbew ur.ieHieH.www C:\Users\ao\source\repos\exercise.exe (process 20648) exited with code 0. Press any key to close this window . . .
The solution of a more competent programmer
std::string reverse_words(std::string str)
{
std::string out;
std::string cword;
for (char c : str) {
if (c == ' ') {
out += cword;
out += c;
cword = "";
continue;
}
cword = c + cword;
}
out += cword;
return out;
}
Article author: Andrei Olegovich