flexible array in structures in a flexible array (AKA inception)
#include <stdlib.h>
#include <stdio.h>
struct data *poly;
struct data{
int a;
double coeff;
};
void resize(size_t n);
struct data inputdata()
{
printf("please enter the order of your polynomial");
int b;
scanf("%d", &b);
struct data polynomial;
polynomial.a = b;
////////////////////////////////////////////
for(int i = 0; i<=b; i++){
printf("enter your coeffiecient");
scanf("%le",&polynomial.coeff[i]);
}//end for
return polynomial;
}
void resize(size_t n)
{
poly = realloc(poly,n *(sizeof *poly));
}
int main(void)
{
poly = malloc(sizeof(int)+ sizeof(double));
size_t i, n;
printf("how many polynomials do you want to make");
scanf("%ld",&n);
resize(n);
for(i = 0; i<n; i++){
poly[i] = inputdata();
}
free(poly);
}
I'm trying to code something that makes polynomials: the user can choose how many polynomials they want to make, choose the order of polynomials and enter in all their coefficients. Obviously, I need to tidy up how they asked for the data and stuff but I'm just trying to get it working first.
I'm storing each polynomial in a structure, the structures are all held in a flexible array. Each structure has a flexible array in it and I just can't get how to allocate memory to the flexible array within the structure the code above works if there's no flexible array in the structure but when its in it I get the note: the ABI of passing struct with a flexible array member has changed in GCC 4.4 error any idea how to fix this?
struct dynamic-memory-allocation dynamic-arrays
edited Nov 25 '18 at 20:12
Federico Grandi
3,21621230
asked Nov 25 '18 at 16:30
KealanKealan
11
add a comment |
#include <stdlib.h>
#include <stdio.h>
struct data *poly;
struct data{
int a;
double coeff;
};
void resize(size_t n);
struct data inputdata()
{
printf("please enter the order of your polynomial");
int b;
scanf("%d", &b);
struct data polynomial;
polynomial.a = b;
////////////////////////////////////////////
for(int i = 0; i<=b; i++){
printf("enter your coeffiecient");
scanf("%le",&polynomial.coeff[i]);
}//end for
return polynomial;
}
void resize(size_t n)
{
poly = realloc(poly,n *(sizeof *poly));
}
int main(void)
{
poly = malloc(sizeof(int)+ sizeof(double));
size_t i, n;
printf("how many polynomials do you want to make");
scanf("%ld",&n);
resize(n);
for(i = 0; i<n; i++){
poly[i] = inputdata();
}
free(poly);
}
I'm trying to code something that makes polynomials: the user can choose how many polynomials they want to make, choose the order of polynomials and enter in all their coefficients. Obviously, I need to tidy up how they asked for the data and stuff but I'm just trying to get it working first.
I'm storing each polynomial in a structure, the structures are all held in a flexible array. Each structure has a flexible array in it and I just can't get how to allocate memory to the flexible array within the structure the code above works if there's no flexible array in the structure but when its in it I get the note: the ABI of passing struct with a flexible array member has changed in GCC 4.4 error any idea how to fix this?
struct dynamic-memory-allocation dynamic-arrays
edited Nov 25 '18 at 20:12
Federico Grandi
3,21621230
asked Nov 25 '18 at 16:30
KealanKealan
11
add a comment |
#include <stdlib.h>
#include <stdio.h>
struct data *poly;
struct data{
int a;
double coeff;
};
void resize(size_t n);
struct data inputdata()
{
printf("please enter the order of your polynomial");
int b;
scanf("%d", &b);
struct data polynomial;
polynomial.a = b;
////////////////////////////////////////////
for(int i = 0; i<=b; i++){
printf("enter your coeffiecient");
scanf("%le",&polynomial.coeff[i]);
}//end for
return polynomial;
}
void resize(size_t n)
{
poly = realloc(poly,n *(sizeof *poly));
}
int main(void)
{
poly = malloc(sizeof(int)+ sizeof(double));
size_t i, n;
printf("how many polynomials do you want to make");
scanf("%ld",&n);
resize(n);
for(i = 0; i<n; i++){
poly[i] = inputdata();
}
free(poly);
}
I'm trying to code something that makes polynomials: the user can choose how many polynomials they want to make, choose the order of polynomials and enter in all their coefficients. Obviously, I need to tidy up how they asked for the data and stuff but I'm just trying to get it working first.
I'm storing each polynomial in a structure, the structures are all held in a flexible array. Each structure has a flexible array in it and I just can't get how to allocate memory to the flexible array within the structure the code above works if there's no flexible array in the structure but when its in it I get the note: the ABI of passing struct with a flexible array member has changed in GCC 4.4 error any idea how to fix this?
struct dynamic-memory-allocation dynamic-arrays
edited Nov 25 '18 at 20:12
Federico Grandi
3,21621230
asked Nov 25 '18 at 16:30
KealanKealan
11
#include <stdlib.h>
#include <stdio.h>
struct data *poly;
struct data{
int a;
double coeff;
};
void resize(size_t n);
struct data inputdata()
{
printf("please enter the order of your polynomial");
int b;
scanf("%d", &b);
struct data polynomial;
polynomial.a = b;
////////////////////////////////////////////
for(int i = 0; i<=b; i++){
printf("enter your coeffiecient");
scanf("%le",&polynomial.coeff[i]);
}//end for
return polynomial;
}
void resize(size_t n)
{
poly = realloc(poly,n *(sizeof *poly));
}
int main(void)
{
poly = malloc(sizeof(int)+ sizeof(double));
size_t i, n;
printf("how many polynomials do you want to make");
scanf("%ld",&n);
resize(n);
for(i = 0; i<n; i++){
poly[i] = inputdata();
}
free(poly);
}
I'm trying to code something that makes polynomials: the user can choose how many polynomials they want to make, choose the order of polynomials and enter in all their coefficients. Obviously, I need to tidy up how they asked for the data and stuff but I'm just trying to get it working first.
I'm storing each polynomial in a structure, the structures are all held in a flexible array. Each structure has a flexible array in it and I just can't get how to allocate memory to the flexible array within the structure the code above works if there's no flexible array in the structure but when its in it I get the note: the ABI of passing struct with a flexible array member has changed in GCC 4.4 error any idea how to fix this?
struct dynamic-memory-allocation dynamic-arrays
struct dynamic-memory-allocation dynamic-arrays
edited Nov 25 '18 at 20:12
Federico Grandi
3,21621230
asked Nov 25 '18 at 16:30
KealanKealan
11
edited Nov 25 '18 at 20:12
Federico Grandi
3,21621230
asked Nov 25 '18 at 16:30
KealanKealan
11
edited Nov 25 '18 at 20:12
Federico Grandi
3,21621230
edited Nov 25 '18 at 20:12
Federico Grandi
3,21621230
edited Nov 25 '18 at 20:12
Federico Grandi
3,21621230
3,21621230
asked Nov 25 '18 at 16:30
KealanKealan
11
asked Nov 25 '18 at 16:30
KealanKealan
11
asked Nov 25 '18 at 16:30
KealanKealan
11
11
add a comment |
add a comment |
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