int wareki(char *nengou, int year)
{
int i;
typedef struct {
int y; /* 서기년 */
char *w; /* 일본이 달력 연호 */
} TBL;
static TBL tbl[] = {
{708,"나라시대의 연호"},{715,"령귀"},{717,"양로"},{724,"진키"},
{729,"나라시대의 연호"},{749,"나라시대의 연호"},{757,"나라시대의 연호"},{765,"나라시대의 연호"},
{767,"진고케이운"},{770,"보귀"},{781,"텐노"},{782,"연력"},
{807,"대동"},{810,"홍인"},{824,"헤이안초기의 연호"},{834,"죠와"},
{848,"가죠"},{851,"인수"},{854,"헤이안 초기의 연호"},{857,"천안"},
{859,"죠간"},{877,"간교"},{885,"니와"},{889,"간표"},
{898,"쇼타이"},{901,"엥기"},{923,"연장"},{931,"죠헤이"},
{938,"텐쿄(연호)"},{947,"헤이안중기의 연호"},{957,"천자의 덕"},{961,"오와"},
{964,"고호"},{968,"아와"},{970,"헤이안중기의 연호"},{973,"텐엔(연호)"},
{976,"사다모토"},{978,"만물생육의 근원"},{983,"에이칸"},{985,"간나"},
{987,"영연"},{989,"에이소"},{990,"쇼랴쿠"},{995,"장덕"},
{999,"헤이안중기의 연호"},{1004,"간코"},{1012,"나가와"},{1017,"간닌"},
{1021,"치안"},{1024,"만수"},{1028,"장원"},{1037,"장력"},
{1040,"장구"},{1044,"간토쿠"},{1046,"에이쇼"},{1053,"텐기(연호)"},
{1058,"야스히라"},{1065,"지랴쿠"},{1069,"노베히사"},{1074,"죠호"},
{1077,"조랴쿠"},{1081,"에이호"},{1084,"오토쿠"},{1087,"간지"},
{1094,"가호"},{1096,"에이쵸"},{1097,"승덕"},{1099,"고와"},
{1104,"장치"},{1106,"가죠"},{1108,"헤이안말기의 연호"},{1110,"천영"},
{1113,"영구"},{1118,"겐에이"},{1120,"보안"},{1124,"텐지(연호)"},
{1126,"오오하루"},{1131,"텐쇼(연호)"},{1132,"장승"},{1135,"보연"},
{1141,"에이지"},{1142,"코지"},{1144,"헤이안말기의 연호"},{1145,"규안"},
{1151,"니히라"},{1154,"구장수"},{1156,"보원"},{1159,"헤이지"},
{1160,"에이랴쿠"},{1161,"오호"},{1163,"장관"},{1165,"에이만"},
{1166,"인안"},{1169,"가오"},{1171,"쇼안"},{1175,"야스모토"},
{1177,"지쇼"},{1181,"요우와"},{1182,"스연"},{1184,"겐랴쿠"},
{1185,"문치"},{1190,"겐큐"},{1199,"마사하루"},{1201,"겐닌"},
{1204,"겐큐"},{1206,"겐에이"},{1207,"죠겐"},{1211,"겐랴쿠"},
{1213,"겐포"},{1219,"죠큐"},{1222,"죠오"},{1224,"겐닌"},
{1225,"가로쿠"},{1227,"안정"},{1229,"간기"},{1232,"죠에이"},
{1233,"가마쿠라중기의 연호"},{1234,"문력"},{1235,"가테이"},{1238,"력인"},
{1239,"연응"},{1240,"인치"},{1243,"간겐"},{1247,"보치"},
{1249,"겐쵸"},{1256,"고겐"},{1257,"쇼카"},{1259,"마사모토"},
{1260,"문응"},{1261,"홍장"},{1264,"문영"},{1275,"켄지"},
{1278,"홍안"},{1288,"쇼오"},{1293,"영인"},{1299,"쇼안"},
{1302,"겐겐"},{1303,"가겐"},{1306,"덕치"},{1308,"연경"},
{1311,"오쵸"},{1312,"마사카즈"},{1317,"문보"},{1319,"겐오"},
{1321,"겐코"},{1324,"정중"},{1326,"가랴쿠"},{1329,"겐토쿠"},
{1331,"겐코"},{1334,"겐무"},{1336,"연원"},{1340,"흥국"},
{1346,"쇼헤이"},{1370,"켄토쿠"},{1372,"문중"},{1375,"하늘이 부여함"},
{1381,"히로카즈"},{1384,"겐추"},{1394,"오에이"},{1428,"쇼쵸"},
{1429,"에이쿄"},{1441,"요시키치"},{1444,"문안"},{1449,"호우토쿠"},
{1452,"향덕"},{1455,"고쇼"},{1457,"장녹"},{1460,"관정"},
{1466,"문정"},{1467,"오닌"},{1469,"문명"},{1487,"장향"},
{1489,"연덕"},{1492,"묘오"},{1501,"문귀"},{1504,"에이쇼"},
{1521,"다이에이"},{1528,"향녹"},{1532,"천문"},{1555,"코우지"},
{1558,"에이로쿠"},{1570,"겐키"},{1573,"덴쇼(연호)"},{1592,"문녹"},
{1596,"게이쵸"},{1615,"겐나"},{1624,"에도초기의 연호"},{1644,"쇼호"},
{1648,"게이안"},{1652,"쇼오"},{1655,"명력"},{1658,"만치"},
{1661,"간분"},{1673,"연보"},{1681,"에도초기의 연호"},{1684,"죠쿄"},
{1688,"겐로쿠"},{1704,"호우에이"},{1711,"쇼토쿠"},{1716,"향보"},
{1736,"모토후미"},{1741,"간포"},{1744,"연향"},{1748,"칸엔"},
{1751,"호레키"},{1764,"메이와"},{1772,"야스나가"},{1781,"텐메이"},
{1789,"너그러운 정치"},{1801,"향화"},{1804,"문화"},{1818,"분세"},
{1830,"에도말기의 연호"},{1844,"홍화"},{1848,"요시나가"},{1854,"안정"},
{1860,"만연"},{1861,"분큐"},{1864,"겐지"},{1865,"케이오"},
{1868,"메이지"},{1912,"타이쇼"},{1926,"쇼와"},{1989,"헤세이"},
{9999,""}};
if (year < tbl[0]. y || year >= 9999) return -1;
for (i = 0; ; i++)
if (tbl[i]. y <= year && year < tbl[i+1]. y) break;
strcpy(nengou, tbl[i]. w);
return year - tbl[i]. y + 1;
}