1.
#include <stdio.h>
void main ()
{
int nnumber,ncount,i=0 ;
printf("please put a number :");
scanf("%d",&nnumber);
if(nnumber>=0&&nnumber<10000)
{
printf("该倒序为;\n");
while (nnumber!=0)
{
ncount=nnumber%10;
nnumber=nnumber/10;
i++;
printf("%d ",ncount);
}
printf("这是一个%d位数\n",i);
}
else
printf("error\n"); }
2.
#include<stdio.h>
void main ()
{
int nrandom,nnumber=0,ncount=0;
char cchar;
do
{
srand(time(NULL));
nrandom=rand()%100+1;//产生一个1~100的随机数
do
{
scanf("%d",nnumber);
if(nnumber>nrandom)
{
printf("too big\n");
}
if (nnumber=nrandom)
{
printf("congratulation! you are rigt !\n");
}
else
{
printf("too small");
}
ncount++;
}
while (nnumber!=nrandom);
printf(" a total of %d timis\n\n\n\n",ncount);
printf("Do you want to guss again?\n");
printf("A.yes B.no \n");
scanf("%c",cchar);
}
while (cchar!='B');
printf("Next time you are welcome to\n"); }
3.
#include<stdio.h>
#include<math.h>
void main()
{
double x1,x0,f,f1;
x1=1.5;
do
{
x0=x1;
f = 2*x0*x0*x0-4*x0*x0+3*x0-6;
f1=6*x0*x0-8*x0+3;
x1=x0-f / f1;//牛顿迭代公式 xn+1=xn-f(xn) / f '(xn)
}
while(fabs(x1-x0)>1e-6);
printf("the root of equation is %lf\n",x1);
}
4.
#include<stdio.h>
main( )
{
int ngn,nsn,nqn,nwn,nnumber;
printf("please put a number(10000~99999):\n");
scanf("%d",&nnumber);
nwn=nnumber/10000;
nqn=nnumber%10000/1000;
nsn=nnumber%100/10;
ngn=nnumber%10;
if (ngn==nwn&&nsn==nqn)/*个位等于万位并且十位等于千位*/
printf("this number is a huiwen\n");
else
printf("this number is not a huiwen\n");
}
5.
#include <stdio.h>
void main()
{
int k[10];
int i,j,n,s;
for(j=999;j>=2;j--)
{
n=-1;
s=j;
for(i=1;i <= j/2; i++)
{
if((j%i)==0)
{
n++;
s=s-i;
k[n]=i;
}
}
if(s==0)
{
printf("%d is a wanshu ",j);
for(i=0;i < 10; i++)
printf("%d ",k[i]);
printf("\n");
}
}
}
6.
是输入的十个数按从小到大排列