Compilare: user.c: In function ‘main’: user.c:4:1: warning: suggest parentheses around assignment used as truth value [-Wparentheses] {while(a=!b) ^ user.c:5:1: warning: implicit declaration of function ‘abs’ [-Wimplicit-function-declaration] a=abs(a-b); ^ user.c:4:10: warning: ‘b’ is used uninitialized in this function [-Wuninitialized] {while(a=!b) ^ user.c:7:2: warning: ‘p’ is used uninitialized in this function [-Wuninitialized] a=p; ^