What are the best alternatives to `itoa()` for integer-to-string conversion in C ?

itao() Replacement for Integer-to-String Conversion in C

In C , the itoa() function is typically used to convert an integer to a string. However, this function has limitations and may not be available in certain environments. This article explores alternatives to itoa() to address these issues.

std::to_string: C 11 and Later

C 11 introduced the std::to_string function as a more modern and reliable alternative to itoa(). This function takes an integer value as an argument and returns a string representation of the number.

#include <string>

int main() {
    int i = 5;
    std::string s = std::to_string(i);
    return 0;
}

C Streams

If you are working with C prior to version 11, you can use C streams to convert an integer to a string. This approach involves creating astringstream object and using operator insertion (<<) to stream the integer into the stream.

#include 

int main() {
    int i = 5;
    std::stringstream out;
    out << i;
    std::string s = out.str();
    return 0;
}

Other Alternatives
In addition to std::to_string and C   streams, there are other libraries and techniques that can be used for integer-to-string conversion, such as:


Boost.lexical_cast: A header-only library that provides type conversion functions, including integer-to-string.

sprintf: A C-style function that formats a variable into a buffer. Can be used with integers and strings.

snprintf: A safer version of sprintf that takes an explicit buffer size to prevent buffer overflows.

The choice of alternative depends on the specific requirements of your program and available resources.
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