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Simple C Program help!

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08-10-2007 8:07pm

L'prof

Registered Users Posts: 11,996 ✭✭✭✭

Join Date: September 2007

Posts: 11883

This is supposed to sum up numbers entered by the user but, for some reason it seems to only add every second number!!!

# include <stdio.h>

int main(void){
    int sum = 0;
    int add = 0;

    while (scanf("%d", &add) == 1){
	scanf("%d", &add);
	sum = sum + add;
	printf("Sum = %d\n", sum);}

    printf("\nThe sum of those numbers is %d.\n", sum);
    return 0;
}

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#2 08-10-2007 8:11pm
bbbbb

Registered Users Posts: 731 ✭✭✭

Join Date: January 2004

Posts: 678

looks like you're doing scanf twice, but only adding once. try it without the second scanf statement.

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#3 08-10-2007 8:11pm
henbane

Registered Users Posts: 1,636 ✭✭✭

Join Date: July 2003

Posts: 1445

You're using scanf twice in each pass through loop.

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#4 08-10-2007 8:16pm
L'prof

Registered Users Posts: 11,996 ✭✭✭✭

Join Date: September 2007

Posts: 11883

Oh really? I thought the first one was just a test! Thanks!

That works now, cheers!

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#5 08-10-2007 8:59pm
Giblet

Registered Users Posts: 11,977 ✭✭✭✭

Join Date: October 2001

Posts: 11368

jasonorr wrote:

Oh really? I thought the first one was just a test! Thanks!

That works now, cheers!

Remember, anytime you call a function, you are running it AND testing its result.

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