pointer help

[shy abyss]

#include <stdio.h>

int nzd(int n,int m)
{
    int nzd;
    while (n % m)
    {
        nzd = n % m;
        n = m;
        m = nzd;
    }
    return nzd;
}
//Greatest common divisor 
int nzsf(int a, int b){
    int nzs;
    nzs = (a * b)/nzd(a, b);
    return nzs;
}
//smallest common multiple
int skrati(int *a,int *b,int c,int d)
{
    while (*a!=c&&*b!=d)
    {
        *a/=nzd(*a,*b);
        *b/=nzd(*a,*b);
    }
}
/*where the problem lies,the functions supposed to shorten the fraction of a/b to an unshortened fraction of c/d*/
int main()
{
    int *a,*b,c,d, nzd1;
    scanf("%d%d%d%d",&*a,&*b,&c,&d);
    nzd1=nzd(*a,*b);
    if ((nzd1)==1)
        printf("Numbers are coprime integers");
    else{
    printf("%d",nzd1);
    printf("%d",nzd(nzd1,c));
    skrati(&a,&b,c,d);
    printf("Test %d %d",a,b);
    }
    return 0;
}

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[shy abyss]

pretty sure the problem is somewhere in main when im calling the pointers because before i switched from normal integers to pointers it worked fine

[iron spear]

int *a,*b,c,d, nzd1;
scanf("%d%d%d%d",&*a,&*b,&c,&d);

This is wrong

What you have to remember is that pointers need to point to some variable/memory address
Here a and b are defined as pointers, but where they point to are never defined

int a,b,c,d, nzd1;
scanf("%d%d%d%d",&a,&b,&c,&d);
// ...
skrati(&a,&b,c,d);

[shy abyss]

ahhh

thank you

[simple karma]

@shy abyss Has your question been resolved? If so, run !solved :)

[shy abyss]

!solved