cfree笔记1计算1210之和includemainintisumsum0存放累加变量必须先赋0值i1whileisumsumiiprintf1210dsum函数实现参照下面阶乘2阶乘includemainintinsumprintf请输入一个数scanfdampnsum1fori1isumsumiprintfdsum函数实现重要includeintfactintnintit1fori1ittireturntintmainintnresultprintf请输入一个数scanfdampnresultfactnprintfdresult计算1210includemainintijlongtsumsum0fori1it1forj1jttjsumsumtprintfdsum3字符输入1234charcforcgetchargetcharcgetcharputcharc结果13forcgetcharccgetcharputcharc结果1234forcgetcharcgetcharcgetcharputcharc结果244输入10个整数找出最大值和最小值重要includemaininta10i