C++实现查找数组中的值

#include<iostream>

using namespace std;

int FindValue(int ,int[] ,int);

int main()

{
int intArray[]={1,2,3,4,5,6,7,8,9};
int intValue, len, returnValue;
len=sizeof(intArray)/sizeof(int);
cout<<"Enter the number that you want to find:";
cin>>intValue;
returnValue=FindValue(intValue,intArray,len);
if (returnValue<len)
{
cout<<"The number"<<intValue<<"'s position:"<<returnValue+1;
}
else
cout<<"Can not find the number";
return 0;

}

int FindValue(int intValue,int a[],int len)

{
for (int i=0;i<len;++i)
{
if (a[i]==intValue)
{
return i;
}
}
return len;

}