C++实现填充数组，输入一个目标值，查询该目标值是否在该数组中且输入所在数组的索引。 其具体实现代码如下：
#include<iostream> using namespace std; const int largeLength = 4; void fillArray(int a[],int number,int& numberUsed) { int index=0,next; cout<<"请输入"<<number<<"个非负数,"; cout<<"键入负数表示结束！\n"; cout<<"请输入数字："<<endl; cin>>next; while((next>=0)&&(index<number)) { a[index]=next; index++; cin>>next; } numberUsed = index; } int search(int a[],int number,int target) { int index = 0; bool found = false; while((!found)&&index<number) { if(target ==a[index]) found=true; else index++; } if(found) return index; else return -1; } int main() { int as[largeLength],numberUsed,target; char ans; int result; fillArray(as,largeLength,numberUsed); cout<<"numberUsed的值为："<<numberUsed<<endl; do { cout<<"enter a number for search "<<endl; cin>>target; result = search(as,numberUsed,target); if(result == -1) cout<<"error。。。"<<endl; else cout<<target<<"is stored in array position "<<result<<endl; cout<<"search again?"<<endl; cin>>ans; }while((ans!='N')&&(ans!='n')); cout<<"The end"<<endl; return 0; }