>>637
文字列を返す関数の作り方がわからなかったので表示だけ

//lib.h
#ifndef _lib_c_
#define _lib_c_

#include <stdio.h>

extern void draw_kansuji(int num);

#endif



//lib.c
#include "lib.c"

void draw_kansuji(int num)
{
    const char kanji[10][3]={"零","壱","弐","参","四","五","六","七","八","九"};

    if (num==0)
        return;

    draw_kansuji(num/10);
    printf("%s", kanji[num%10]);
}