#include <stdio.h>
#include <time.h>
#include <math.h>
#include <string.h>

#define REPEAT (1000 * 10000)

static void a1( double a )
{
        static char b[30];
        char * p;

        sprintf (b, "%f", a);
        p = strchr (b, '.');
        if (p) *p=',';

        printf ("%s", b);
}

static void a2( double a )
{
    static char loc = ',';

    printf( "%d%c%d", (int)a, loc, (int)((a-(int)a)*1000000) );
}

int main()
{
    unsigned int i, j = (unsigned int)time(NULL);
    for( i = 0; i < REPEAT; i++ ) a1( 92.2345 );
    printf( "\na1: %u\n", (unsigned int)time(NULL) - j );
    for( i = 0; i < REPEAT; i++ ) a2( 92.2345 );
    j = (unsigned int)time(NULL);
    printf( "\na2: %u\n", (unsigned int)time(NULL) - j );
    return 0;
}