polynomial Assingment through file in c : I want to assign the exponent and coefficient information input from the file to the circular linked list. 

file "a.txt" is as follows   

    8 3
    7 2
    3 0


However, there are also strange values ​​in the output like this. i wanted to make the list circular, but it doesn't. 

    coef    expon 
    3       0
    7       2
    8       3
    7887744 0
    7900240 0
    7864656 0
    7869712 0
    7900240 0
    7864656 0
    7869712 0

 please, I can't find the solution.

    #include <stdio.h>
    #include <stdlib.h>
    typedef struct polyNode* polyPointer;
    typedef struct polyNode{
	int  coef;
	int expon;
	polyPointer link;
    };

    int main()  {
    polyPointer A, B, C = (polyPointer)malloc(sizeof(polyPointer)) ;
    FILE *fa, *fb ;
    int a;
 
    fa = fopen("a.txt", "r");
    if(fa==NULL){
	printf("file open error\n");
	
	return 1;
    }
    if(fb==NULL){
	printf("file open error\n");
	return 1;    
    }
    A = create_circle_linked_poly(fa);
    printf("coef	expon\n");
    int i;
    for(A; i<10; A=A->link, i++)
    printf("%d	%d\n", A->coef, A->expon); 
    return 0;
    }

    polyPointer create_circle_linked_poly(FILE *a){
	polyPointer head = malloc(sizeof(polyPointer));
	polyPointer temp = malloc(sizeof(polyPointer));
	first = head;
	int res;
	while(1){
		polyPointer p =(polyPointer) malloc(sizeof(polyPointer));
		res = fscanf(a, "%d %d", &p->coef, &p->expon);
		if(res==EOF)break;
		p->link = head;
		head = p;	 
	}
	return head;   
    }