read from file and put into double array ...

[rox]

i got stuck on another subject here:

i got a file of format:

1;Name One
2;Name Two
etc...

i have to read that, and put it into:

the numeric part in an int array1[x]
and the name part into char array2[x][y]

so this way i can reference from array1 to array2... it's not only a double array, it's also paralel arrays.

now i got this and it doesn't work right... i can't find a symilar example anywhere:

void prep_product_report(){
	FILE *fp;
	int i;
	int prod_codes[12];
	char prod_desc[12][30];
	int salesman_no[10];
	char salesman_name[10][30];
	
	if((fp = fopen("salespeople.dat", "r")) == NULL)
		printf("Can not open salespeople.dat file.\n");
	else{
		rewind(fp);
		for(i = 0; i<10; i++){
		  fscanf(fp, "%d;%s", salesman_no, salesman_name[i]);
	  }
	  fclose(fp);
  }

	if((fp = fopen("products.dat", "r")) == NULL)
		printf("Can not open products.dat file.\n");
	else{
		rewind(fp);
		for(i = 0; i<12; i++){
			fscanf(fp, "%*d;%s", prod_codes, prod_desc[i]);
		}
	fclose(fp);
	}

  product_report(prod_codes, prod_desc, salesman_no, salesman_name);
}

problem is i am forced to create a function declared:

void product_report(int prod_codes[ ], char prod_desc[ ][30], int  salesman_no[ ], char salesman_name[ ][30]);

any help much appreciated.

Thank you!

[Sebastiani]

>> fscanf(fp, "%d;%s", salesman_no, salesman_name[i]);

Shouldn't that be:

>> fscanf(fp, "%d;%s", &salesman_no[i], salesman_name[i]);

Ditto for the other loop.

[rox]

it only puts a character in there (not even the first char). It's not reading the whole string. And the salesman one isn't reding anything.

[Salem]

> fscanf(fp, "%*d;%s", prod_codes, prod_desc[i]);
Well the * is assignment suppression. You read an int, but it isn't written anywhere.

Also, add some error checking and use a debugger.

int num = fscanf(fp, "%d;%s", &prod_codes[i], prod_desc[i]);
if ( num != 2 ) // panic!!!

[rox]

ok, it's not reading right (or rather it's not assigning)... is that how you use fscanf to read more lines? does fscanf read from where it left off last time? now i'm getting even more confused.

yead, the * was left in there from another test i made, it's a mistake.... and i added the &.

yet, a simplified test like this works:

main(){
	char arry[2][30];
	int arry2[2];

	printf("Enter name(dd;ccc):");
	scanf("%d;%s", &arry2[0], &arry[0]);
	
	printf("%s \n", arry[0]);
	printf("%d \n", arry2[0]);
}

am i not doing the same thing (except reading from file instead of stdin)?

[Salem]

> is that how you use fscanf to read more lines?
It will pick up from the end of the previous fscanf() call.
So if you just have a file containing
12 hello
34 world

kinda thing, then it will read those as you would expect by calling fscanf() in a loop with a "%d %s" format