The Sprintf ()() Function in C

This guide covers the sprintf ()() function in c with practical context and easy-to-follow details. Use it to understand the subject and apply the information confidently.

Declare the Sprintf ()() Function in C

Below is the declaration for the sprintf () function in C:

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

Parameters

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

Format - This is the string containing the text to be written to the buffer. It may optionally contain formatting tags that can be embedded that are replaced by values defined in subsequent additional parameters and formatted as required. Prototype tags of the format % [flags] [width] [. Precision] [length] specifier , explained as follows:

Character specifier Character d or i Decimal integer with the sign e Scientific symbol (mantissa / exponent) uses the character e E Scientific notation (mantissa / exponent) using characters E f Actual floating point number Decimal g Short use of% e or% f G Compact use of% E or% fo Octal number signed s Character string u Unsigned decimal number x Hexadecimal integers mark X Unsigned hexadecimal integers (uppercase letters) p Pointer address n Do not print anything% characters

Additional parameters - Depending on the format format string, this function may have an additional parameter array, each containing a value to be inserted instead of each% -tag specified in the format parameter, if. This number of parameters should be the same number as% -tags that expect a value.

Returns the value

If successful, the total number of characters recorded will be returned to exclude null characters appended at the end of the string. If it fails, return a negative number.

For example

The following program C illustrates the usage of the sprintf () function in C:

 #include #include int main () { char str [ 80 ]; sprintf ( str , "Gia tri cua Pi = %f" , M_PI ); puts ( str ); return ( 0 ); } 

Compiling and running the above C program will result:

According to Tutorialspoint

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