Pointers in C

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    #include <stdio.h>
    
    void update(int *a,int *b) {
        int max, diff;
        max = *a + *b;
        diff = abs(*a - *b);
        printf("%d\n%d",max,diff);    
    }
    
    int main() {
        int a, b;
        int *pa = &a, *pb = &b;
        
        scanf("%d %d", &a, &b);
        update(pa, pb);
        //printf("%d\n%d", a, b);
    
        return 0;
    }