scanf()的一些用法救命

#include <stdio.h>

int main( void )
{
    int i1;//from  w w  w .j  a  va  2 s .com
    int i2;
    long l1;

    double d1;
    char buf1[80];
    char buf2[80];

    /* Using the l modifier to enter long integers and doubles.*/

    puts(Enter an integer and a floating point number.);
    scanf(%ld %lf, &l1, &d1);
    printf(\nYou entered %ld and %lf.\n,l1, d1);
    puts(The scanf() format string used the l modifier to store);
    puts(your input in a type long and a type double.\n);

    fflush(stdin);

    /* Use field width to split input. */

    puts(Enter a 5 digit integer (for example, 54321).);
    scanf(%2d%3d, &i1, &i2);

    printf(\nYou entered %d and %d.\n, i1, i2);

    fflush(stdin);

    /* Using an excluded space to split a line of input into */
    /* two strings at the space. */

    puts(Enter your first and last names separated by a space.);
    scanf(%[^ ]%s, buf1, buf2);
    printf(\nYour first name is %s\n, buf1);
    printf(Your last name is %s\n, buf2);

    return 0;
}