Compilare: user.cpp: In function ‘int main()’: user.cpp:26:29: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘short int*’ [-Wformat=] scanf ("%d",&a[i][j]); ^ user.cpp:47:84: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (a[l][c]==0||(l1==l&&c1==c)||(l2==l&&c2==c)&&a[l][c]!=-1&&l>0&&c>0&&l<=n&&c<=n){ ^ user.cpp:19:32: warning: unused variable ‘z’ [-Wunused-variable] int n,k1,l1,c1,k2,l2,c2,i,j,pp,z=0,cate=0,ic,sf; ^ user.cpp:19:36: warning: unused variable ‘cate’ [-Wunused-variable] int n,k1,l1,c1,k2,l2,c2,i,j,pp,z=0,cate=0,ic,sf; ^ user.cpp:54:9: warning: variable ‘nr0’ set but not used [-Wunused-but-set-variable] int nr1,nr0=9999; ^ user.cpp:16:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("vis.in","r",stdin); ^ user.cpp:17:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("vis.out","w",stdout); ^ user.cpp:22:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d%d%d%d%d%d",&n,&k1,&k2,&l1,&c1,&l2,&c2); ^ user.cpp:26:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d",&a[i][j]); ^ user.cpp:183:12: warning: ‘nr1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int s1=nr1+nr3; ^