C programs to work with recursion

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#include
int add(int pk,int pm);
main()
{
int k ,i,m;
m=2;
k=3;
i=add(k,m);
printf("The value of addition is %d\n",i);
}
int add(int pk,int pm)
{
if(pm==0) return(pk); \\ A
else return(1+add(pk,pm-1)); \\ B
}

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#include
int fact(int n);
long old=0; \\E
long current=0; \\F
main()
{
int k = 4,i;
long diff;
i =fact(k);
printf("The value of i is %d\n",i);
diff = old-current;
printf("stack overheads are %16lu\n",diff);
}
int fact(int n)
{
int j;
static int m=0;
if(m==0) old =(long) &j; \\A
if(m==1) current =(long) &j; \\B
m++; \\C
printf("the address of j and m is %16lu %16lu\n",&j,&m); \\D
if(n<=0)
return(1);
else
return(n*fact(n-1));
}

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