Description

The C library function, This sprintf function writes formatted output to an object pointed to by s.

Declaration

Following is the declaration for sprintf() function.

int sprintf(char *str, const char *format, ...);

Parameters

Str - This is the pointer to an array of char elements where the resulting C string is stored.

Format - C string that contains a format string that follows the same specifications as format in printf (see printf for details).

A format specifier follows this prototype:

%[flags][width][.precision][length]specifier

Where the specifier character at the end is the most significant component, since it defines the type and the interpretation of its corresponding argument:

The format specifier can also contain sub-specifiers: flags, width, .precision and modifiers (in that order), which are optional and follow these specifications:

additional arguments - Format string refers to a string that contains formatting information, and arg1, arg2. are argument that represent the individual output data items. The control string can include a flag, Which affects the apperance of the output. The flag must be placed immediately afterr percent sign(%).

Return Value

The sprintf function returns the number of characters stored in the array (not including the null character).

Example

#include <stdio.h>
#include <math.h>

int main()
{
   char s[80];

   sprintf(s, "Value of Pi = %f", M_PI);
   puts(s);
   
   return(0);
}

Output

Value of Pi = 3.141593