Parse input file in C

[Lucky Beniwal]

I need to write a function parse_in with the following prototype :

int parse_in(FILE *f, int *cost[][]){
/* parse the input file and fill in const array
* Need to return the number of cities read in from the file
* Need to alloca memory for cost
*/
}


Using this function, I need to allocate memory for cost, read nxn lines, fill in cost and return n where n is the number of cities.

I will open the input file, input.txt in main before using this function.

Can you help me on it..

The code to open the input file is:

int main()
{File *in,*out;
int i ,n;
char buffer[100];
int ch;
char c;

in = fopen("input.tx t","r");


fgets(buffer, 10, in);
n = atoi(buffer);
printf("Number of Cities: %d \n\n", n);

while(!feof(in) )
{

c = fgetc(in);
printf("%c",c);
}

fclose(in);
getchar();
return 0;

}


can you guide me on it please.?
I need to do this for travelling salesman problem.

[weaknessforcats]

THis is not a function prototype:

int parse_in(FILE *f, int *cost[][]){
/* parse the input file and fill in const array
* Need to return the number of cities read in from the file
* Need to alloca memory for cost
*/
}

It's the actual function. It just has a comment for a body.

All you have to do is replae the comment with tyour calculation.

This is the function prototype:

int parse_in(FILE *f, int *cost[][]);