string help

[Tommy1998]

hello lets say we have string x = "abcdefgh";
what i want to do is to remove letters for example i would like to make from this is just bcdefgh and then cdefgh i dont want to use substring and i wanted to do smth like x[0] = ""; so i can clear that space in string but it doesnot work , any ideas guys ? thanks.

[TarikNeaj]

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

Edit : Example -

string x = "Tarik Neaj";
	
x.replace(0,2, ""); // First parameter tells it where to begin. Second how many characters to replace, third what to replace it with.

cout << x << endl;

output:

rik Neaj

[Tommy1998]

thanks tarik so much :)

[TarikNeaj]

My pleasure :)

[Tommy1998]

string z = "12345";

for (int i = 1; i < z.length(); i++)
{
z.replace(0, i, "");
cout << z << endl;
}


output should be like 2345 345 45 5 but it isnot i didnot get the pointi dont understand that >D
// got it i know where was mistake.

[TarikNeaj]

Hey, please use code tags for all of your code - http://www.cplusplus.com/articles/jEywvCM9/

Problem is that. Its replacing them completely, thats what this function does.

you have your string to begin with

string z = "12345".

Your loop runs 4 times. First loop you replace 1 with nothing. So it outputs

2345

.

Now your string looks like this - "2345".

So the second round of the loop, you replace the first position string, which is now 2, and then 2 characters. So it removed 2 and 3, now your output is

45

.

If you want the output you requested, you have to re-give your string the original value.

string z = "12345";

	for (int i = 1; i < z.length(); i++)
	{
		z.replace(0, i, "");
		cout << z << endl;
		z = "12345"; // here
	}

[Tommy1998]

thanks , i already created other "algorithm" to do that using replace func , thanks anyway

[S G H]

Replace is unnecessarily overkill.
Use erase (check out the example code there):
http://www.cplusplus.com/reference/string/string/erase/

[TarikNeaj]

Yeh in this case erase should be used over replace, I just showed him replace incase he needed to not just replace stuff with a whit space.

[Tommy1998]

thanks SGH i already used replace and it works as i wanted to so its ok , thanks :)