问题及解答

>> (a+b)^n

out> a^62+62a^61b+1891a^60b^2+37820a^59b^3+557845a^58b^4+6471002a^57b^5+61474519a^56b^6+491796152a^55b^7+3381098545a^54b^8+20286591270a^53b^9+107518933731a^52b^10+508271323092a^51b^11+2160153123141a^50b^12+8308281242850a^49b^13+29078984349975a^48b^14+93052749919920a^47b^15+273342452889765a^46b^16+739632519584070a^45b^17+1849081298960175a^44b^18+4282083008118300a^43b^19+9206478467454345a^42b^20+18412956934908690a^41b^21+34315056105966195a^40b^22+59678358445158600a^39b^23+96977332473382725a^38b^24+147405545359541742a^37b^25+209769429934732479a^36b^26+279692573246309972a^35b^27+349615716557887465a^34b^28+409894288378212890a^33b^29+450883717216034179a^32b^30+465428353255261088a^31b^31+450883717216034179a^30b^32+409894288378212890a^29b^33+349615716557887465a^28b^34+279692573246309972a^27b^35+209769429934732479a^26b^36+147405545359541742a^25b^37+96977332473382725a^24b^38+59678358445158600a^23b^39+34315056105966195a^22b^40+18412956934908690a^21b^41+9206478467454345a^20b^42+4282083008118300a^19b^43+1849081298960175a^18b^44+739632519584070a^17b^45+273342452889765a^16b^46+93052749919920a^15b^47+29078984349975a^14b^48+8308281242850a^13b^49+2160153123141a^12b^50+508271323092a^11b^51+107518933731a^10b^52+20286591270a^9b^53+3381098545a^8b^54+491796152a^7b^55+61474519a^6b^56+6471002a^5b^57+557845a^4b^58+37820a^3b^59+1891a^2b^60+62ab^61+b^62
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原因是, 程序将 n 视为 '0'+14, 而 '0'的 ASCII 码是 48, 故这里 n 等于 62.