Compilare: user.c: In function ‘descif’: user.c:9:6: warning: type of ‘x1’ defaults to ‘int’ [-Wimplicit-int] void descif(x1, y1, x2, y2){ ^ user.c:9:6: warning: type of ‘y1’ defaults to ‘int’ [-Wimplicit-int] user.c:9:6: warning: type of ‘x2’ defaults to ‘int’ [-Wimplicit-int] user.c:9:6: warning: type of ‘y2’ defaults to ‘int’ [-Wimplicit-int] user.c:10:9: warning: unused variable ‘k’ [-Wunused-variable] int k=0, jumx, jumy, i1, j1, i; ^ user.c: In function ‘main’: user.c:47:15: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr+=val; ^