Thread: Assignment to a structure array member

Hi

im having problems with assigning to a value directly to a member of an array structure.

my structure defination is:

Code:

struct student {
	int ID;
	char Name[50];
	char Date[10];
	float Min_temp;
	float Max_temp;
        int Valid;
} record[20];

I have already initialised these values successfully for my 20 records, however in a later bit of code im trying to change the value of 'Valid' for a particular record from 1 to 0.

I am trying to do this for any given record of the array using a variable, the value of which is botained from a scanf. The whole program compiles successfully, the problem is purely that the value is not changed from 1 to 0 when i wish it to be.

my assignment line looks like this :

record[x].Valid = 0;

where x is the value obtained from the scanf.

any help with this would be hugely appreciated, as it is the only thing not working correctly right now! :P

this is the code I tested:

Code:

#include <stdio.h>

struct student {
	int ID;
	char Name[50];
	char Date[10];
	float Min_temp;
	float Max_temp;
    int Valid;
} record[20];

int main(){
	int i, x;
	for(i = 0; i < 20; i++)
		record[i].Valid = 1;
	scanf("&#37;d", &x);
	record[x].Valid = 0;
	for(i = 0; i < 20; i++)
		printf("%2d: %d\t", i, record[i].Valid);
	return(0);
}

I named it "1.cpp" and then compiled it.
this is the result:

Code:

1.exe
3
 0: 1    1: 1    2: 1    3: 0    4: 1    5: 1    6: 1    7: 1    8: 1    9: 1
10: 1   11: 1   12: 1   13: 1   14: 1   15: 1   16: 1   17: 1   18: 1   19: 1


1.exe
5
 0: 1    1: 1    2: 1    3: 1    4: 1    5: 0    6: 1    7: 1    8: 1    9: 1
10: 1   11: 1   12: 1   13: 1   14: 1   15: 1   16: 1   17: 1   18: 1   19: 1


1.exe
9
 0: 1    1: 1    2: 1    3: 1    4: 1    5: 1    6: 1    7: 1    8: 1    9: 0
10: 1   11: 1   12: 1   13: 1   14: 1   15: 1   16: 1   17: 1   18: 1   19: 1

It seems nothing wrong.

You may have a try to add
printf("%d\n", x);
before
record[x].Valid = 0;
to see if "x" has strange value.

thanks alot guys i managed to solve my problem with your help, it was to do with how i had nested the assignment within several If statements - quite messy :P

sorry i know its not helpful not posting my entire code its just im reluctant to as it is for an assignment

thanks again