In javascript I can format a string using template string
const cnt = 12;
console.log(`Total count: ${cnt}`);
if I work with python I can use the f-string:
age = 4 * 10
f'My age is {age}'
But, if I working with C++(17) what is the best solution to do this (if it is possible)?
I think the simpler way is std::to_string:
std::string str = "My age is ";
str += std::to_string(age);
std::ostringstream also works nicely and can be useful as well:
With this at the top of your source file
#include <sstream>
Then in code, you can do this:
std::ostringstream ss;
ss << "My age is " << age;
std::string str = ss.str();
you can use sprintf
sprintf(dest_string, "My age is %d", age).
but using sprintf will rase an error, so best use snprintf:
snprintf(dest_string, size , "My age is %d", age);
where size is the is the maximum number of bytes.
If you want to write to stdout:
const int cnt = 12;
std::cout << "Total count: " << cnt << "\n";
Writing to any other stream works similar. For example replace std::cout by a std::ofstream to write to a file. If you need the formatted string:
std::ostringstream oss;
oss << "Total count: " << cnt << "\n";
std::string s = oss.str();
std::cout << s;