static declaration in functions follows non-static declaration

[Mike Ko]

#include <stdio.h>
int main()
{
int n=20;
int A[n], B[n], C[n];
int addarrays (int add1, int add2, int counter);
int i;
for(i=0; i<n; i++)
{
printf("%d", addarrays(A[i], B[i], i));
}

int addarrays (int add1, int add2, int counter) //defining function
{
C[counter]= add1 + add2;
printf("%d", C[counter]);
return C[counter];
}
}

I am trying to create a function that adds elements of arrays in a specific way (for uni) but i get the error that was in the title.

[weaknessforcats]

You are defining the addarrays fnction inside main().

Plus you are using main()varaibles directly insde the function.

!) write your function ouside main()
2) pass main() variables to the function.
3) inside the function use the argumwnt variables only.

[lspxy]

#include <stdio.h>

#define N 20

int C[N];
int addarrays (int add1, int add2, int counter); // declare function

int main()
{
    
	int A[N], B[N];	// A[], B[] should be initialed before used.
	int i;

	for(i=0; i<n; i++)
	{
		printf("%d\t", addarrays(A[i], B[i], i));
		printf("\n");
	}
}

int addarrays (int add1, int add2, int counter) //defining function
{
	C[counter]= add1 + add2;

	printf("%d", C[counter]);

	return C[counter];
}

[weaknessforcats]

This:

for(i=0; i<n; i++)
etc...

should be:

for(i=0; i<N; i++)
etc...

[lspxy]

yea, so careless. thanks.