Prerrequisito: Introducción a los punteros
Puntero a array
C++
#include <iostream>
using namespace std;
int main()
{
int arr[5] = { 1, 2, 3, 4, 5 };
int *ptr = arr;
cout <<"\n"<< ptr;
return 0;
}
// thus code is contributed by shivanisinghss2110
C
#include<stdio.h>
int main()
{
int arr[5] = { 1, 2, 3, 4, 5 };
int *ptr = arr;
printf("%p\n", ptr);
return 0;
}
C++
// C++ program to understand difference between
// pointer to an integer and pointer to an
// array of integers.
#include <iostream>
using namespace std;
int main()
{
// Pointer to an integer
int *p;
// Pointer to an array of 5 integers
int (*ptr)[5];
int arr[5];
// Points to 0th element of the arr.
p = arr;
// Points to the whole array arr.
ptr = &arr;
cout << "p =" << p <<", ptr = "<< ptr<< endl;
p++;
ptr++;
cout << "p =" << p <<", ptr = "<< ptr<< endl;
return 0;
}
// This code is contributed by SHUBHAMSINGH10
C
// C program to understand difference between
// pointer to an integer and pointer to an
// array of integers.
#include<stdio.h>
int main()
{
// Pointer to an integer
int *p;
// Pointer to an array of 5 integers
int (*ptr)[5];
int arr[5];
// Points to 0th element of the arr.
p = arr;
// Points to the whole array arr.
ptr = &arr;
printf("p = %p, ptr = %p\n", p, ptr);
p++;
ptr++;
printf("p = %p, ptr = %p\n", p, ptr);
return 0;
}
C++
// C++ program to illustrate sizes of
// pointer of array
#include <bits/stdc++.h>
using namespace std;
int main()
{
int arr[] = { 3, 5, 6, 7, 9 };
int *p = arr;
int (*ptr)[5] = &arr;
cout << "p = "<< p <<", ptr = " << ptr << endl;
cout << "*p = "<< *p <<", *ptr = " << *ptr << endl;
cout << "sizeof(p) = "<< sizeof(p) <<
", sizeof(*p) = " << sizeof(*p) << endl;
cout << "sizeof(ptr) = "<< sizeof(ptr) <<
", sizeof(*ptr) = " << sizeof(*ptr) << endl;
return 0;
}
// This code is contributed by shubhamsingh10
C
// C program to illustrate sizes of
// pointer of array
#include<stdio.h>
int main()
{
int arr[] = { 3, 5, 6, 7, 9 };
int *p = arr;
int (*ptr)[5] = &arr;
printf("p = %p, ptr = %p\n", p, ptr);
printf("*p = %d, *ptr = %p\n", *p, *ptr);
printf("sizeof(p) = %lu, sizeof(*p) = %lu\n",
sizeof(p), sizeof(*p));
printf("sizeof(ptr) = %lu, sizeof(*ptr) = %lu\n",
sizeof(ptr), sizeof(*ptr));
return 0;
}
C++
// C++ program to print the elements of 3-D
// array using pointer notation
#include <iostream>
using namespace std;
int main()
{
int arr[2][3][2] = {
{
{5, 10},
{6, 11},
{7, 12},
},
{
{20, 30},
{21, 31},
{22, 32},
}
};
int i, j, k;
for (i = 0; i < 2; i++)
{
for (j = 0; j < 3; j++)
{
for (k = 0; k < 2; k++)
cout << *(*(*(arr + i) + j) +k) << "\t";
cout <<"\n";
}
}
return 0;
}
// this code is contributed by shivanisinghss2110
C
// C program to print the elements of 3-D
// array using pointer notation
#include<stdio.h>
int main()
{
int arr[2][3][2] = {
{
{5, 10},
{6, 11},
{7, 12},
},
{
{20, 30},
{21, 31},
{22, 32},
}
};
int i, j, k;
for (i = 0; i < 2; i++)
{
for (j = 0; j < 3; j++)
{
for (k = 0; k < 2; k++)
printf("%d\t", *(*(*(arr + i) + j) +k));
printf("\n");
}
}
return 0;
}
C++
// C++ program to print elements of a 2-D array
// by scripting a pointer to an array
#include <iostream>
using namespace std;
int main()
{
int arr[3][4] = {
{10, 11, 12, 13},
{20, 21, 22, 23},
{30, 31, 32, 33}
};
int (*ptr)[4];
ptr = arr;
cout << ptr<< " "<< ptr + 1<< " "<< ptr + 2 << endl;
cout << *ptr<< " "<< *(ptr + 1)<< " "<< *(ptr + 2)<< endl;
cout << **ptr<< " "<< *(*(ptr + 1) + 2)<< " "<< *(*(ptr + 2) + 3)<< endl;
cout << ptr[0][0]<< " "<< ptr[1][2]<< " "<< ptr[2][3]<< endl;
return 0;
}
// This code is contributed by shivanisinghss2110
C
// C program to print elements of a 2-D array
// by scripting a pointer to an array
#include<stdio.h>
int main()
{
int arr[3][4] = {
{10, 11, 12, 13},
{20, 21, 22, 23},
{30, 31, 32, 33}
};
int (*ptr)[4];
ptr = arr;
printf("%p %p %p\n", ptr, ptr + 1, ptr + 2);
printf("%p %p %p\n", *ptr, *(ptr + 1), *(ptr + 2));
printf("%d %d %d\n", **ptr, *(*(ptr + 1) + 2), *(*(ptr + 2) + 3));
printf("%d %d %d\n", ptr[0][0], ptr[1][2], ptr[2][3]);
return 0;
}
Publicación traducida automáticamente
Artículo escrito por GeeksforGeeks-1 y traducido por Barcelona Geeks. The original can be accessed here. Licence: CCBY-SA