Updated: April 19, 2023 |
Convert a long integer into a string, using a given base
#include <stdlib.h> char* ltoa( long value, char* buffer, int radix ); char* lltoa( long long value, char* buffer, int radix );
2 <= radix <= 36
If the value of radix is 10, and value is negative, then a minus sign is prepended to the result.
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The ltoa() and lltoa() functions convert the given long integer value into the equivalent string in base radix notation, storing the result in the character array pointed to by buffer. A NUL character is appended to the result.
A pointer to the result, or NULL if an error occurs (errno is set).
#include <stdio.h> #include <stdlib.h> void print_value( long value ) { int base; char buffer[33]; for( base = 2; base <= 16; base = base + 2 ) { printf( "%2d %s\n", base, ltoa( value, buffer, base ) ); } } int main( void ) { print_value( 12765 ); return EXIT_SUCCESS; }
produces the output:
2 11000111011101 4 3013131 6 135033 8 30735 10 12765 12 7479 14 491b 16 31dd
ltoa() is QNX Neutrino; lltoa() is Unix
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | Yes |
Signal handler | Yes |
Thread | Yes |