Question

Can anyone explain in simple terms how I can traverse a string to manipulate it element-by-element using pointers in C++??

Answer 1

I don't really know the way it works in C++, because in C++ the 'default' std::string is a class (or maybe a template, I don't know )

in C, It's accomplished using pointer arithmetic: http://ideone.com/DKZRh

Answer 2

Ok suppose i have a string and i want to replace all vowels by '#'
char str[5]='abcde';
char *str1=str;
for(i=0;i<5;i++)
{
if(*(str1+i)=='a') // give all conditions
*(str1+i)='#';
}

Answer 3

http://www.cplusplus.com/reference/string/string/find/

http://www.cplusplus.com/reference/string/string/replace/

and iterating through the vowels should do it.

Answer 4

Well, if you are programming in C++, use std::string and don't use pointers into it if you don't have to.

A simple example:

...
string my_string = "Fred Derf";
for (int x = 0; x < my_string.length(); x++)
cout << "I found the letter " << my_string[x] << endl;
...

If you are asking this to learn about pointers, then the code might look like this

...
const char* my_string = "Fred Derf";
for (const char* c = my_string; *c ; c++)
cout << "I found the letter " << *c << endl;
...

The second example walks the array of characters until the trailing NULL is found, thus causing the *c expression to be interpreted as "false"