C++实现填充数组，并将数组按照从先到大的顺序输出。 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\n"; 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; cout<<"numberUsed的值为："<<numberUsed<<endl; } int smallResult(int a[],int startIndex,int numberUsed) { int minValue = a[startIndex], minIndex = startIndex; for(int index = startIndex+1;index < numberUsed;index ++) { if(a[index] < minValue) { minValue = a[index]; minIndex = index; } } return minIndex; } void swap(int& a,int& b) { int tmp; tmp = a; a = b; b = tmp; } void sort(int a[],int numberUsed) { int indexOfNextSmall; int index = 0; for(index = 0;index < numberUsed-1;index ++) { indexOfNextSmall = smallResult(a,index,numberUsed); swap(a[index],a[indexOfNextSmall]); } } int main() { int as[largeLength],numberUsed; fillArray(as,largeLength,numberUsed); sort(as,numberUsed); cout<<"In sorted order the numbers are "<<endl; for(int index = 0;index < numberUsed;index++) cout<<as[index]<<endl; return 0; }