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#include <stdio.h>
 
int input(int a[], int max_n)
{
	int i,n;
 
	scanf("%d", &n);
	if(n>max_n)
		n=max_n;
	for(i=0;i<n;++i)
		scanf("%d", &a[i]);
	return n;
}
 
void print(int a[], int n)
{
	int i;
 
	for(i=0;i<n;++i)
		printf("%d ", a[i]);
	printf("\n");	
}
 
int copy_except(int dst[],int src[],
				int n,int v)
{
	int i,j;
 
	for(i=0;i<n;++i)
		if(src[i]!=v)
			dst[i]=src[i];
	return j;	
}
 
 
int main(void)
{
	int a[100];
	int b[100];
	int n,max_n=100;
	int v=99;
 
	n1=input(a,max_n);
	n2=copy_except(b,a,n1,v);
	print(b,n);
	return 0;
}
 

prog.c: In function 'main':
prog.c:43:2: error: 'n1' undeclared (first use in this function)
  n1=input(a,max_n);
  ^
prog.c:43:2: note: each undeclared identifier is reported only once for each function it appears in
prog.c:44:2: error: 'n2' undeclared (first use in this function)
  n2=copy_except(b,a,n1,v);
  ^

Standard output is empty