Is there the uses of pointer right? - c

Question

I want to use pointer in here, but it's not right.
It has Thread 1: breakpoint 1.1 (1) in
(*(exy + i)) = g;
Please tell me how use the operation of pointer.
#define _CRT_SECURE_NO_WARNINGS
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wstrict-prototypes"
#include<stdio.h>
#include<stdlib.h>
#define M 3
#define N 3
int readmoduluskai(filename, time, gcoef, kcoef, ge, ke, dm)
char filename[];
char dm[];
double *time, *gcoef, *kcoef;
double *ge, *ke;
{
FILE *fp;
int i = 0;
printf("Modulus file name : ");
scanf("%s", filename);
if (NULL == (fp = fopen(filename, "r"))) {
printf("\7\n Cannot open file..\n\n");
exit(1);
}
//fscanf(fp, "%12lg", &ge);
//fscanf(fp, "%12lg", &ke);
//printf("%12lg %12lg \n", ge, ke);
while (3 == fscanf(fp, "%lg %lg %lg", time, gcoef, kcoef)) {
printf("%12lg %12lg %12lg \n", *(time), *(gcoef), *(kcoef));
time++;
gcoef++;
kcoef++;
i++;
}
//printf("Please enter the constitutive parameters : ");
//scanf("%s", dm);
fclose(fp);
return i;
}
int readdata(file, t, ex, ey, ez, eyz, ezx, exy, ekk)
char *file;
double *t, *ex, *ey, *ez, *eyz, *ezx, *exy, *ekk;
{
double a, b, c, g;
FILE *fp;
int i = 0;
printf("File name : ");
scanf("%s", file);
if (NULL == (fp = fopen(file, "r"))) {
printf("Cannot open file..\n\n");
exit(1);
}
while (4 == fscanf(fp, "%lg %lg %lg %lg", &a, &b, &c, &g)) {
printf("%12lf %12lf %12lf %12lf \n", a, b, c, g);
(*(t + i)) = a;
(*(ex + i)) = b;
(*(ey + i)) = c;
(*(exy + i)) = g;
i++;
}
fclose(fp);
return i;
}
int main(int argc, char *argv[])
{
char filename[20];
char dm[2];
char file[20];
double *time;
double ptime = 0;
time = &ptime;
double *gcoef;
double pgcoef = 0;
gcoef = &pgcoef;
double *kcoef;
double pkcoef = 0;
kcoef = &pkcoef;
double *ge;
double pge = 0;
ge = &pge;
double *ke;
double pke = 0;
ke = &pke;
double *t;
double pt = 0;
t = &pt;
double *ex;
double pex = 0;
ex = &pex;
double *ey;
double pey = 0;
ey = &pey;
double *ez;
double pez = 0;
ez = &pez;
double *eyz;
double peyz = 0;
eyz = &peyz;
double *ezx;
double pezx = 0;
ezx = &pezx;
double *exy;
double pexy = 0;
exy = &pexy;
double *ekk;
double pekk = 0;
ekk = &pekk;
time = (double *)malloc(sizeof(double));
gcoef = (double *)malloc(sizeof(double));
kcoef = (double *)malloc(sizeof(double));
ge = (double *)malloc(sizeof(double));
ke = (double *)malloc(sizeof(double));
readmoduluskai(filename, time, gcoef, kcoef, ge, ke, dm);//read the modulus parameters
readdata(file, t, ex, ey, ez, eyz, ezx, exy, ekk);
free(time);
free(gcoef);
free(kcoef);
free(ge);
free(ke);
return 0;
}
how can I change it