一个关于c++指针的问题
#include<iostream>intmain(){usingnamespacestd;double*p3=newdouble[3];p3[0]=0.2;p3[1]=...
#include<iostream>
int main()
{
using namespace std;
double * p3 = new double [3];
p3[0] = 0.2;
p3[1] = 0.5;
p3[2] = 0.8;
cout << "p3[1] is " << p3[1] << ".\n";
p3 = p3 + 1;
cout << "Now p3[0] is " << p3[0] << " and ";
cout << "p3[1] is " << p3[1] << ".\n";
p3 = p3 - 1;
delete [] p3;
return 0;
}
p3+1过后,p[0] = 0.5我能理解,但是为什么p[1]也跟着指向后面一个元素变成0.8,难道p[1]不应该还是0.5么,如果p[1]跟着变得话,那p[2]指向哪个元素。
求助 展开
int main()
{
using namespace std;
double * p3 = new double [3];
p3[0] = 0.2;
p3[1] = 0.5;
p3[2] = 0.8;
cout << "p3[1] is " << p3[1] << ".\n";
p3 = p3 + 1;
cout << "Now p3[0] is " << p3[0] << " and ";
cout << "p3[1] is " << p3[1] << ".\n";
p3 = p3 - 1;
delete [] p3;
return 0;
}
p3+1过后,p[0] = 0.5我能理解,但是为什么p[1]也跟着指向后面一个元素变成0.8,难道p[1]不应该还是0.5么,如果p[1]跟着变得话,那p[2]指向哪个元素。
求助 展开
2个回答
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