C++ | 数组逆序 | 问题总结

源代码

#include<iostream>
#include<fstream>
using namespace std;
typedef int ElemType;
const int n = 10;

void MyExchange(ElemType *a, ElemType *b){
	ElemType temp;
	temp = *a;  
	*a = *b;
	*b = temp;
}

void InverseArry(ElemType  arry[n], int  n){
	ElemType *p = & arry[0];
	ElemType *q = & arry[ n - 1];
	while (p < q)//指针不相遇

	{
		MyExchange(p, q);
		p++;
		q--;
	}

}

void PrintArrya(ElemType  arry[n], int  n) {
	fstream f1;
	f1.open("t1.txt", ios::in | ios::app);
	cout << "逆序操作前:" << endl;
	for (int i = 0; i < n; i++) {
		f1 >> arry[i];
		cout << arry[i] << endl;
	}
}
void PrintArryb(ElemType  arry[n], int  n){
	cout << "逆序操作后:" << endl;
	for (int i = 0; i <  n; ++i) {
		cout <<  arry[i] << endl;
	}
	cout << endl;

}

int main()
{
	ElemType arry[n] ;
	PrintArrya(arry, n);
	InverseArry(arry, n);
	PrintArryb(arry, n);
	system("pause");
	return 0;

}