Conversion of numbers and characters

Today we found a very useful function: sprintf (), which is used to convert numbers into characters. Its usage is similar to our
Printf ("% d", INTA) (similar, exactly the same ).

Example:
Here

Its function prototype is:

Include < Stdio. h >

int sprintf ( char * restrict S, const Char * restrict format ,...);

at the same time, sprintf has a friendly snprintf (), which can capture the first few digits of the output. For example, output 125 only "12 ".

it is easy to convert characters into numbers. The standard library provides atoi (). Or, we recommend using strtol ().

I learned how to use C ++ for a day and found that I forgot everything I learned before.
come on.