=====sprintf=====
Syntax:

<code>
    #include <cstdio>
    int sprintf( char *buffer, const char *format, ... );
</code>
The sprintf() function is just like printf(), except that the output is sent to
buffer. The return value is the number of characters written. For example:

<code>
     char string[50];
     int file_number = 0;

     sprintf( string, "file.%d", file_number );
     file_number++;
     output_file = fopen( string, "w" );
</code>
Note that sprintf() does the opposite of a function like atoi() -- where atoi()
converts a string into a number, sprintf() can be used to convert a number into
a string.
For example, the following code uses sprintf() to convert an integer into a
string of characters:

<code>
     char result[100];
     int num = 24;
     sprintf( result, "%d", num );
</code>
This code is similar, except that it converts a floating-point number into an
array of characters:

<code>
     char result[100];
     float fnum = 3.14159;
     sprintf( result, "%f", fnum );
</code>

Note that this function does not check the bounds of the buffer and therefore creates the risk of a buffer overflow.
A secure alternative is [[c/io/snprintf]]

Related Topics: [[c/io/snprintf]], [[c/string/atof]], [[c/string/atoi]], [[c/string/atol]], [[fprintf]], [[printf]]