Thread: Need help please to pass struct array to fucntion

Code:

#include <stdio.h>
	typedef struct
	{
		int x;
		int y;
	}POINT;


	void display(POINT);


	int main()
	{
		int i;
		POINT p1[10];
		for (i = 0; i < 10;i++)
		{
			p1[i].x =i*2;      // 
			p1[i].y = i * 4;   //
		}
		display(p1);
		
	}
	void display(POINT p[])
	{
		for (int i = 0; i < 10;i++)
		printf("The coordinates of the point are: %d %d \n", p[i].x, p[i].y);
	}

display(p1); seems not working to pass to function display I tried p1[] not working any advise please thank you.

Originally Posted by Prelude

> void display(POINT);
> void display(POINT p[])

Did you ignore errors and warnings when compiling? Because your declaration doesn't match the definition.

Code:

#include <stdio.h>
typedef struct
{
	int x;
	int y;
}POINT;


void display(POINT p[])
{
	for (int i = 0; i < 10; i++)
		printf("The coordinates of the point are: %d %d \n", p[i].x, p[i].y);
}




int main()
{
	int i;
	POINT p1[10];
	for (i = 0; i < 10; i++)
	{
		p1[i].x = i * 2;      // 
		p1[i].y = i * 4;   //
	}
	display(p1);


}

Yes my mistake, This format is working perfectly, How can I declare it in like first style writing? thank you

Originally Posted by nuklon

How can I declare it in like first style writing?

If you mean have the declaration above main and the declaration below, just copy the function header, paste it above main, and add a semi-colon.

Code:

#include <stdio.h>

typedef struct
{
    int x;
    int y;
} POINT;

void display(POINT p[]);

int main()
{
    int i;
    POINT p1[10];

    for (i = 0; i < 10; i++)
    {
        p1[i].x = i * 2;
        p1[i].y = i * 4;
    }

    display(p1);
}

void display(POINT p[])
{
    for (int i = 0; i < 10; i++)
        printf("The coordinates of the point are: %d %d \n", p[i].x, p[i].y);
}

You should used named constants instead of the magic number 10.

You should also pass the number of elements to your function along with the array, instead of hard-coding this value inside of the function.