Problem with "pointer from integer without a cast"
Hi, I have yet another problem after spending a full day today working on my program. What I am trying to do is to read a textfile, and put the values within the textfile into proper categories within the struct. So in this case I have built a struct containing the members, which are categories that I want the values to be in.
Here is my struct:
Code:
struct database_input {
int categoryA;
int categoryB;
double categoryC;
int categoryD;
};
where the format of one line of the data
(the textfile consists of alot of lines of the same format):
Quote:
1.3.1.2 = 3.97438e-05 121 1
in which I want the first number (1.3.1.2) to go into the first category and the second number (3.97438e-05) to go in the 2nd category and so on.
What I did to get 1.3.1.2 to be and int is to establish a loop to skip the periods and only read 1312 as a string, then typecast it back to int. For the second number, since everything is in e-05, I only read the number up to 3.97438, and then I typecast to double and divide by 10000.
Here is how I call the function in main:
Code:
int main()
{
struct database_input data[99999];
initializing_structs(data); //for setting all values to 0
read_input( inputname , data);
...
the function code is:
Code:
void read_input( FILE *ifp, struct database_input *data)
{
int i=0;
char number = NULL;
char *categoryA_number = NULL;
char *categoryC_f = NULL;
double categoryC_number;
char *categoryB_number;
while( i<99999 && feof(ifp) != 1)
{
while( number != ' ')
{
fscanf( ifp, number);
if (number != '.')
strcat(categoryA_number, number);
}
data[i].categoryA = (int)*categoryA_number;
ifp = ifp+2;
number = NULL;
while( number != 'e')
{
fscanf( ifp,number);
strcat(categoryC_f, number);
}
categoryC_number = (double)*categoryC_f;
data[i].categoryC = categoryC_number/10000;
ifp = ifp+5;
number = NULL;
while( number != ' ')
{
fscanf( ifp, number);
if (number != '.')
strcat(categoryB_number, number);
}
data[i].categoryB = (int)*categoryB_number;
ifp = ifp+1;
number = NULL;
fscanf( ifp, number);
data[i].categoryD = (int)number;
number = NULL;
while( number != '\n')
{
fscanf( ifp, number);
ifp++;
}
i++;
}
}
I know this is a long post, but please keep on reading...
The program when compiled, had many warnings, like:
Quote:
projectmain.c:91: warning: conflicting types for ‘initializing_structs’
projectmain.c:54: warning: previous implicit declaration of ‘initializing_structs’ was here
projectmain.c:107: warning: conflicting types for ‘read_input’
projectmain.c:55: warning: previous implicit declaration of ‘read_input’ was here
projectmain.c: In function ‘read_input’:
projectmain.c:109: warning: initialization makes integer from pointer without a cast
projectmain.c:121: warning: passing argument 2 of ‘fscanf’ makes pointer from integer without a cast
projectmain.c:123: warning: passing argument 2 of ‘strcat’ makes pointer from integer without a cast
projectmain.c:128: warning: assignment makes integer from pointer without a cast
projectmain.c:132: warning: passing argument 2 of ‘fscanf’ makes pointer from integer without a cast
projectmain.c:133: warning: passing argument 2 of ‘strcat’ makes pointer from integer without a cast
projectmain.c:139: warning: assignment makes integer from pointer without a cast
projectmain.c:143: warning: passing argument 2 of ‘fscanf’ makes pointer from integer without a cast
projectmain.c:145: warning: passing argument 2 of ‘strcat’ makes pointer from integer without a cast
projectmain.c:152: warning: assignment makes integer from pointer without a cast
When I run the program, it just went into segmentation error. I already tried to simplify the function as much as possible, but it still ends up with a long code. Can somebody please help me to find what was wrong with this code, and if possible, ways to fix it? Since the code that I have wrote is a bit confusing, don't hold back in asking me questions about how the logic of the code works.
as for not feof(), I am having difficulties in inplementing the fix in the faq into my code since I am not reading the whole line, I am reading from character to character.
Many Thanks.
