c++ - passing malloc-pointer gives me error -

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• error when passing pointer array of structs 5 answers

when run code gives me segmentation fault error.

#include <stdio.h> #include <stdlib.h>  void function(int **a);  void main() {        int *a = null;     int = 0;     = (int *) malloc(70 * sizeof(int));     function(&a);     (i = 0; < 10; i++){         printf("a : %d\n", a[i]);     }     free(a);  }  void function(int **a){     int = 0;      (i = 0; < 10; i++){         *a[i]=i*2;     } } 

*a[i]=i*2; 

should be

(*a)[i]=i*2; 

because need dereference pointer before applying array subscript operator([]). in current code, [] has more precedence dereference operator(*) per operator precedence table. need parenthesis.

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other things note:

• in c, don't cast result of malloc
• always check result of malloc see if successful

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have been simpler if pass pointer array,i.e, use

function(a); 

instead of passing address of a , change function's signature to:

void function(int *a) 

and using

a[i]=i*2; 

in for loop in function. since a in function points address of first element of array a in main, change make memory a in function points to, reflected in array a in main.