求大佬帮忙看下这道题怎么写，敲了一上午了都不对

#include <stdio.h>
#include <stdlib.h>

size_t count( const char* s )
{
    size_t result = 0;
    for( int i=0,j; sscanf(s+i,"%*lf%n",&j)==0; i+=j )
        ++result;
    return result;
}

void store( const char* s, double* a )
{
    size_t index = 0;
    for( int i=0,j; sscanf(s+i,"%lf%n",&a[index],&j)==1; i+=j )
        ++index;
}

int main( void )
{
    const char* s = "123 12.3 -1.23e-05";

    size_t n = count(s);
    printf( "count = %zu\n", n );

    double* a = malloc( n * sizeof(double) );
    store( s, a );
    for( size_t i=0; i!=n; ++i )
        printf( "%g\n", a[i] );
    free( a );
}