Ax_note.

• in parameter for show_n_char() is formal parameter

#include <stdio.h>
#include <string.h>
#define NAME "ENOMOTHEM, INC."
#define ADDRESS "101 Beijing China"
#define PLACE "Megapolis, CA 00000"
#define WIDTH 40
#define WJXNUM 40
#define SPACE ' '

// function protype
void show_n_char(char ch, int num);

int main(void)
{
    int spaces;
// function call
    show_n_char('A',WJXNUM);
    printf("\n");
    putchar('\n');
    show_n_char('*', WIDTH);
    putchar('\n');
    show_n_char(SPACE, 12);
    printf("%s\n", NAME);
    spaces = (WIDTH - strlen(ADDRESS)) / 2;

    show_n_char(SPACE, spaces);
    printf("%s\n", ADDRESS);
    show_n_char(SPACE, (WIDTH - strlen(PLACE)) / 2);

    printf("%s\n", PLACE);
    show_n_char('*', WIDTH);
    putchar('\n');

    return 0;
}
//function definition
void show_n_char (char ch, int num)
{
    int count;

    for (count = 1; count <= num; count++)
        putchar(ch);
}

C lang:Definition function

原文：https://www.cnblogs.com/enomothem/p/11704721.html