ltoa(), lltoa()

Convert an integer value into a string in a given base

Synopsis:

#include <stdlib.h>

char* ltoa( long value,
            char* buffer,
            int radix );

char* lltoa( int64_t value, 
             char* buffer,
             int radix );

Library:

libc

Description:

The ltoa() and lltoa() functions convert the given 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.

The size of buffer must be at least 33 bytes when converting values in base 2. The radix must be in the range:

2 <= radix <= 36

If radix is 10, and value is negative, then a minus sign is prepended to the result.

Returns:

A pointer to the result.

Examples:

#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

Classification:

ltoa() is QNX 4; lltoa() is Unix

See also:

atoi(), atol(), itoa(), sscanf(), strtol(), strtoul(), ultoa(), utoa()