1. #define dprintf(expr) printf(#expr="%d",exp);

main()

{int x=7, y=3;

dprintf(x/y);}

2. Int i=-1,j=-1,k=0,l=2,m;

m=i++&&j++&&k++||l++;

printf("%d,%d,%d,%d,i,j,k,l,m);

3.struct s

{int x, float y}s1={24,45.0};

union u

{ int x, float y} u1=(union u)s1;

printf("%d,%f,u1.x,u1.y);

4.#define var(a,b) (a*b)/(a-b)

main()

{

int a=20, b=10,c

c=var(a+4,b-2);

printf("%d",c)

}

5. Char *g()

{

static char x[1000];

return x;

}

main()

{

char *g1="string one";

strcpy(g(),g1);

g1=g();

strcpy(g1,"string two");

printf("%s",g());---->i don't remeber that here g(), g1,prepare both

}

6. Int k=5;

if(++k<5&&k++5.); -->here there was a semicolon after if statement, so careful

printf("%d",k);

7. #define var(a,f,g,)

#define .

#define .

,, ,,

,, ,,

main()

{

#if def cat

printf("cat");

#else

printf("tiger");

}