sprintf() - I/O Function
How is "sprintf()" used in C++?
Explanation
sprintf() is an I/O function that writes the formatted data to an array.This function returns the total number of characters, but on failure a negative value is returned.
int sprintf ( char * str, const char * format, ... );
The following table lists the type specifier used with sprintf()
[decimal 4 in the array] is print from the array
In the above example the "sprintf()" is used print the formatted data from an array "arr".
Syntax:
int sprintf ( char * str, const char * format, ... );
The following table lists the type specifier used with sprintf()
| Type | Description |
| c | Character |
| d or i | Signed decimal integer |
| e | Scientific notation using e character |
| E | Scientific notation using E character |
| f | Decimal floating point |
| g | Use the shorter of %e or %f |
| G | Use the shorter of %E or %f |
| o | Signed octal |
| s | String of characters |
| u | Unsigned decimal integer |
| x | Unsigned hexadecimal integer |
| X | Unsigned hexadecimal integer(capital) |
| p | Pointer address |
| % | A % followed by another % character will write % to the stream. |
Example :
| #include <stdio.h> int main () { char arr [50]; int q=4; sprintf (arr, "decimal %d in the array", q); printf ("[%s] is print from the array\n",arr); return 0; } |
Result:setbufeg.txt
[decimal 4 in the array] is print from the array
In the above example the "sprintf()" is used print the formatted data from an array "arr".
