程序小题目

#include <stdio.h>
#include<conio.h>
#include <iostream>
#include <string.h>
void main()
{
   int i,j,k,count;
   char   s1[100],s2[100];
   printf("Please enter main string:");
   gets(s1);
   printf("enter  sub  string:");
   gets(s2);
   count=0;
for(i=0;s1[i]!='\0';i++)
{
    for(k=0,j=0;(s1[j]==s2[k])&&(s1[j]!='\0');j++,k++);
    if(s2[k]=='\0') 
        count++;
}
printf("\ncount=%d\n",count);
}
//--------------
#include<iostream>
using namespace std;
double fun(double x,int n)
{
    double m1=1,sum=1;
    for(int i=1;i<=n;i++)
    if(i%2==1)
    {
        for(int j=2*i;j>0;j--)
    m1*=x/j;
    sum+=-m1;
    }
    else
    {    
        for(int j=2*i;j>0;j--)
    m1*=x/j;
    sum+=m1;
    }
    return sum;
}
int main()
{
    int x,n;
    cout<<"Please input x:"<<endl;
    cin>>x;
    cout<<"Please input n:"<<endl;
    cin>>n;
    cout<<fun(x,n)<<endl;
}