Keep getting expected identifier or ‘(’ before ‘{’ token

Question

1.00/5 (1 vote)

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How do i get rid of an error

expected identifier or ‘(’ before ‘{’ token

This is my code

#include <stdio.h>
int main(void);
{
int x, y, z;
int r = scanf"%d-%d-%d", &x, &y, &z;
printf"%d\n", r;
return 0;
}

I assume its something to do with my second line, but when I try to fix it it just breaks the code even more. Please bear with me, I'm very new to this and basic coding like this eludes me.

What I have tried:

I've tried removing the semi-colon, but it just breaks the code even harder.

Posted 1-Oct-21 3:49am

Member 15373566

Updated 1-Oct-21 4:14am

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3 solutions

Solution 1

#include <stdio.h>
int main(void)     // <== don't want semi colon here
{
int x, y, z;
int r = scanf("%d-%d-%d", &x, &y, &z);   // function calls require parens
printf("%d\n", r);
return 0;
}

Posted 1-Oct-21 3:59am

jeron1

Comments

CPallini 1-Oct-21 10:08am

5.

jeron1 1-Oct-21 10:20am

Thanks. :)

Member 15373566 1-Oct-21 10:12am

Thanks for the help! If you don't mind me tacking on another question, what does scanf do in this function? No matter my input the output is always 1

jeron1 1-Oct-21 10:34am

Have a look here.
https://www.cplusplus.com/reference/cstdio/scanf/

Solution 3

As everybody knows, if you want to learn the C programming language, then you must greet the world.

C "Hello, World!" Program[^].

Posted 1-Oct-21 4:14am

CPallini

Comments

jeron1 1-Oct-21 10:31am

Indeed!

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OriginalGriff · Accepted Answer · 2021-10-01T04:00:00

Adding a semicolon to a function definition turns it into a forward declaration - which can't have a body.
Remove the semicolon at the end of the "main" line.

scanf is a function: you need to call it by appending open and close round brackets to the name:

C

int x = foo();

Or if you need to supply parameters, they go inside the brackets:

C

int x = foo(666, "a parameter");

scanf requires at least two parameters (a format string, and one or more pointers to locations to store the information) so they go inside the brackets:

C

int r = scanf("%d-%d-%d", &x, &y, &z);

You will need to do the same thing with printf as well.