3.
#include
usingnamespacestd;
voidmain()
{
intm,n,a,b,c;
cout<<"请输入一个数"<cinm;
a=m\100;
b=m\10-a*10;
cout<
4.
#include
usingnamespacestd;
voidmain()
{
intm,n,a,b,c;
cout<<"请输入一个数"<cinm;
a=m\100;
b=m\10-a*10;
c=a%10;
n=a*100+b*10+c;
cout<}
5.
#include
#include"math.h"
usingnamespacestd;
voidmain()
{
inta;
cout<<"请输入一个锐角"<cin>>a;
cout<<"此数的正弦:
"<cout<<"此数的余弦:
"<cout<<"此数的正切:
"<}
6.
#include
usingnamespacestd;
voidmain()
{
cout<cout<cout<}
二.
1.
#include
usingnamespacestd;
voidmain()
{
inta=123456,b,c,d;
cout<<"请输入营业的密码"<cin>>b;
if(a==b)
cout<<"欢迎使用财会报表程序"<else
{
cout<<"密码错,重新输入"<cin>>c;
if(a==c)
cout<<"欢迎使用财会报表程序"<else
{
cout<<"密码错,重新输入"<cin>>d;
if(a==b)
cout<<"欢迎使用财会报表程序"<else
{
cout<<"拒绝使用财会报表软件"<}
}
}
}
2.
#include
usingnamespacestd;
voidmain()
{
inti,j,k,n;
for(n=100;n<=999;n++)
{
i=n/100;
j=n/10%10;
k=n%10;
if(i*100+j*10+k==i*i*i+j*j*j+k*k*k)
cout<}
}
3.
#include
usingnamespacestd;
voidmain()
{
inta,b;
cout<<"情输入年月"<cin>>a;
cin>>b;
switch(b)
{
case1:
cout<<"该月有天"<break;
case3:
cout<<"该月有天"<break;
case5:
cout<<"该月有天"<break;
case7:
cout<<"该月有天"<break;
case8:
cout<<"该月有天"<break;
case10:
cout<<"该月有天"<break;
case12:
cout<<"该月有天"<break;
case4:
cout<<"该月有天"<break;
case6:
cout<<"该月有天"<break;
case9:
cout<<"该月有天"<break;
case2:
{
if((a%4==0)&&(a%100!
=0)||(a%400==0))
cout<<"该月有天"<else
cout<<"该月有天"<}
break;
default:
cout<<"不存在这个月份"<}
}
4.
#include
#include
usingnamespacestd;
voidmain()
{
cout<<(1)<<'\n'
<(2)<<'\n'
<<<<<<(2)<<'\n'
<(1)<<'\n';
}
5.
#include
#include
voidmain()
{
inti,j,k;
intchars=0,nums=0,spaces=0,elses=0;chara[100]="";
printf("请输入一字符串:
\n");
gets(a);
for(i=0;iif(a[i]>='A'&&a[i]<='Z')chars++;
elseif(a[i]>='a'&&a[i]<='z')chars++;
elseif(a[i]>='0'&&a[i]<='9')nums++;
elseif(a[i]=='')spaces++;
elseelses++;
printf("\n字母:
%d数字:
%d空格:
%d其它:
%d\n",chars,nums,spaces,elses);
}
6
#include
#include
#include
usingnamespacestd;
intmain()
{
inta,b;
stringd;
charc[100];
cout<<"请输入文件名:
";
cin>>c;
ifstreamfin(c,ios:
:
binary);
fin>>d;
for(a=0,b=0;d[a]!
='\0';a++)
{
if(d[a]!
='')
b++;
}
cout<<"共有"<
system("pause");
return0;
}