How make a Struct in C - c

Question

I am currently trying to figure out how structs work in C.
I assume that this code is setting the values x and y for the respective position1, position2 to the assigned ones.
However, I keep getting the following error message:
error: expected '=', ',', ';', 'asm' or '__attribute__; before '.' token
Here is the code:
struct position {
int x;
int y;
} position1, position2;
position1.x = 60;
position1.y = 0;
position2.x = 60;
position2.y = 120;
Why is it throwing me that error?

Answer 1

You can initialize your global structs like this:
struct position {
int x;
int y;
} position1 = {60, 0}, position2 = {60, 120};
Or, with a little bit more clarity and designated initializers:
...
} position1 = {.x = 60, .y = 0},
position2 = {.x = 60, .y = 120};

Answer 2

Try:
#include <stdlib.h>
struct position_t {
int x;
int y;
};
int main()
{
struct position_t position1, position2;
position1.x = 60;
position1.y = 0;
position2.x = 60;
position2.y = 120;
return 0;
}
Another way is to use typedef to give the struct an alias:
#include <stdlib.h>
typedef struct position_t {
int x;
int y;
} position;
int main()
{
position position1, position2;
position1.x = 60;
position1.y = 0;
position2.x = 60;
position2.y = 120;
return 0;
}

Answer 3

It seems the problem is that you are trying to place these assignment statements outside a function. You may not do this. You may place only declarations outside a function.
So write the following way
struct position {
int x;
int y;
} position1 = { 60, 6 }, position2 = { .x = 60, .y = 120 };
Also inside a function you may use a compound literal to assign a value to an object of the structure.
Here is a demonstrative program
#include <stdio.h>
struct position {
int x;
int y;
} position1 = { 60, 6 }, position2 = { .x = 60, .y = 120 };
int main( void )
{
printf( "position1: { %d, %d }\n", position1.x, position1.y );
printf( "position2: { %d, %d }\n", position2.x, position2.y );
position1 = ( struct position ) { 10, 20 };
position2 = ( struct position ) { .x = 30, .y = 40 };
printf( "position1: { %d, %d }\n", position1.x, position1.y );
printf( "position2: { %d, %d }\n", position2.x, position2.y );
position1.x = 50;
position1.y = 60;
position2.x = 70;
position2.y = 80;
printf( "position1: { %d, %d }\n", position1.x, position1.y );
printf( "position2: { %d, %d }\n", position2.x, position2.y );
return 0;
}
Its output is
position1: { 60, 6 }
position2: { 60, 120 }
position1: { 10, 20 }
position2: { 30, 40 }
position1: { 50, 60 }
position2: { 70, 80 }

Answer 4

You just have to put all the code after the struct declaration inside the main() function and it does not throw any error. Like that:
#include <stdio.h>
struct position {
int x;
int y;
} position1, position2;
int main(void) {
position1.x = 60;
position1.y = 0;
position2.x = 60;
position2.y = 120;
printf("%d\n", position2.y); // this line is just for testing
}