CODEWITHSUNDEEP
c++string
Vinay
Vinay

Reputation: 188

how to get a string using a string and integer?

I want to get output some thing like this..

Word_1
Word_2
Word_3
.
.
.
Word_1234

etc...

I have seen sprintf and itoa etc to format string, to convert int to string. In case of sprintf I have to declare size. With "Word_"+itoa(iterator_variable), I think I can get what is needed. But is there any better way to get the desired output?

Upvotes: 0

Views: 94

Answers (3)

chmod_007
chmod_007

Reputation: 378

I would recommend stringstreams, as they allow any strings, streams, and arithmetic types (among other things) to be concatenated into a character representation. 

#include <sstream>
#include <iostream>

int main()
{
    int n1 = 3;
    int n2 = 99;
    std::stringstream ss;

    // all entries in the same stringstream
    ss << "Word_" << n1 << std::endl;
    ss << "Word_" << n2 << std::endl;
    std::cout << ss.str();

    // clear
    ss.str("");

    // entries in individual streams
    std::string s1, s2;
    ss << "Word_" << n1;
    s1 = ss.str();
    ss.str("");
    ss << "Word_" << n2;
    s2 = ss.str();
    std::cout << s1 << std::endl << s2 << std::endl;

    return 0;
}

Upvotes: 0

ctor
ctor

Reputation: 6088

If you have access to C++11 you could use std::to_string()

std::string s = "Word_";
std::string t = s + std::to_string( 1234 );
std::cout << t << std::endl;

Upvotes: 1

odedsh
odedsh

Reputation: 2624

Using c++ I like to use boost::format and boost::lexical_cast to solve these sort of problems.

Upvotes: 0

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