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malloc 2d array cpp

Yonatan Gat answered on April 25, 2022 Popularity 9/10 Helpfulness 2/10

answer malloc 2d array cpp

malloc 2d array cpp

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#include <stdio.h>
#include <stdlib.h>
 
int main(void)
{
    int r = 3, c = 4;
 
    int* ptr = malloc((r * c) * sizeof(int));
 
    /* Putting 1 to 12 in the 1D array in a sequence */
    for (int i = 0; i < r * c; i++)
        ptr[i] = i + 1;
 
    /* Accessing the array values as if it was a 2D array */
    for (int i = 0; i < r; i++) {
        for (int j = 0; j < c; j++)
            printf("%d ", ptr[i * c + j]);
        printf("\n");
    }
 
    free(ptr);
 
    return 0;
}

Popularity 9/10 Helpfulness 2/10 Language cpp

Source: www.geeksforgeeks.org

Tags: 2d c++ malloc

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