..页脚.1、输入3个数，求最大数。#include<iostream>usingnamespacestd;intmain(){inta,b,c,max;cout<<"请输入三个数字："<<endl;cin>>a>>b>>c;max=(a>b)?a:b;if(c>max)max=c;cout<<"最大值："<<max<<endl;return0;}2、韩信点兵：有一个数，用3除余2；用5除余3；用7除余2；求满足条件的最小数。#include<iostream>usingnamespacestd;intmain(){inta;for(a=1;a<1000;a++){if(a%3==2&&a%5==3&&a%7==2){cout<<a;break;}}return0;}3、求1+2+3+…+100#include<iostream>usingnamespacestd;intmain(){ints=0;inta=1;do{s=s+a;a=a++;}while(a<101);cout<<s<<endl;return0;}求1-2+3-4+…-100#include<iostream>usingnamespacestd;intmain(){inta,s=0,s1=0,s2=0;for(a=1;a<101;a++,a++){s1+=a;}for(a=-2;a>-101;a=a-2){s2=s2+a;}s=s1+s2;cout<<s<<endl;return0;}求1+1/2+1/3+…+1/100#include<iostream>usingnamespacestd;voidmain(){floata,m;floats=0;for(a=1;a<101;a++){m=1/a;s=s+m;}cout<<"s="<<s<<endl;}求输入n，求n！（需判断n的合法性）递归调用#include<iostream>usingnamespacestd;intfac(intn){if(n==0)return1;elsereturnfac(n-1)*n;}intmain(){while(1){intx,y,n;cout<<"输入一个整数：\n";cin>>x;fac(x);cout<<fac(x)<<endl;break;}return0;}求1！+2！+3！+…+10!#include<iostream>usingnamespacestd;intmain(){ints=0;intt=1;intn;for(n=1;n<11;n++){t=t*n;s=s+t;}cout<<"1!+2!+3!+...+10!="<<s<<endl;return0;}8、求1+1/2!+1/3!+…1/n!，直到1/n!<1E-5为止第一种方法：#include<iostream>usingnamespacestd;voidmain(){doubles=0;doublet=1;doublen=1;do{t=t*n;s=s+1/t;n++;}while(t<1e5);cout<<"1/1!+1/2!+1/3!+...+1/n!="<<s<<endl;}第二种方法：#include<iostream>usingnamespacestd;voidmain(){doublesum=0.0;//结果doublenow=1.0;//现在的1／n！doublecnt=2.0;//现在的nwhile(now>=1e-5){sum+=now;now/=cnt;cnt+=1.0;}cout<<sum<<endl;}用公式求ex=1+x+x2/2!+x3/3!+…+xn/n!。n取20。#include<iostream>usingnamespacestd;intpow(intx,intn);intf1(intn);intmain(intargc,char*argv[]){intx,n;doubleex=1;cin>>x;cin>>n;for(inti=1;i<=n;i++)ex+=pow(x,i)/(f1(i)*1.0);cout<<ex<<endl;system("pause");return0;}intf1(intn){ints=1;for(inti=2;i<=n;i++