## ABC to Convert Integers to Strings in C++

I was solving a problem in TopCoder. It required a conversion of  integer to a string. This is simple in Java but a little complicated in C++. So, I am jotting down here some of the link that helped me. I will also try to make a mention of the problem associated with them.

The first one – itoa. Well, itoa considered unsafe to use this in C++. You may get an error like ” itoa was not declared in the scope “. I got stuck with the same error. It was then I started searching for solutions. The link following is about itoa. Note that, itoa doesn’t work in TopCoder.

http://www.cplusplus.com/reference/clibrary/cstdlib/itoa/

The next link use boost and a string stream. Again, the header file “boost/lexical_cast.hpp” is not detected by TopCoder.

So, I feel, more or less the best way is to have you own customized code.

```string convertInt(int number)
{
if (number == 0)
return "0";
string temp="";
string returnvalue="";
while (number>0)
{
temp+=number%10+48;
number/=10;
}
for (int i=0;i<temp.length();i++)
returnvalue+=temp[temp.length()-i-1];
return returnvalue;
}```

http://www.cplusplus.com/forum/beginner/7777/

If you have any doubt, post in them as comments.

In Java, you can go about with some code like the following. Note, ‘s’ is a String and ‘a’,’ b’ and ‘c’ are Integers.

s = a + ” ” + b + ” ” + c;

Though something like above is possible in C++, it requires ‘a’,’ b’ and ‘c’ to be Strings.

Happy coding ! 🙂

`boost/lexical_cast.hppboost/lexical_cast.hpp`

1. 1

superdrupermegapuper54321…

Very usefull info. Thanks!…

2. 2
navin agarwal Says:

We can use sprintf for this work. It is very simple and works in topcoder.