C Language: vsprintf function
(Formatted String Write Using Variable Argument List)
In the C Programming Language, the vsprintf function writes formatted output to an object pointed to by s using arg as the variable argument list.
Syntax
The syntax for the vsprintf function in the C Language is:
int vsprintf(char *s, const char *format, va_list arg);
Parameters or Arguments
- s
- An array where the output will be written.
- format
Describes the output as well as provides a placeholder to insert the formatted string. Here are a few examples:
Format Explanation Example %d Display an integer 10 %f Displays a floating-point number in fixed decimal format 10.500000 %.1f Displays a floating-point number with 1 digit after the decimal 10.5 %e Display a floating-point number in exponential (scientific notation) 1.050000e+01 %g Display a floating-point number in either fixed decimal or exponential format depending on the size of the number (will not display trailing zeros) 10.5 - arg
- A variable argument list.
Returns
The vsprintf function returns the number of characters stored in the array (not including the null character).
Required Header
In the C Language, the required header for the vsprintf function is:
#include <stdio.h>
Applies To
In the C Language, the vsprintf function can be used in the following versions:
- ANSI/ISO 9899-1990
Similar Functions
Other C functions that are similar to the vsprintf function:
- fprintf function <stdio.h>
- printf function <stdio.h>
- sprintf function <stdio.h>
- vfprintf function <stdio.h>
- vprintf function <stdio.h>
See Also
Other C functions that are noteworthy when dealing with the vsprintf function:
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