Compilare: user.cpp: In function ‘int verif(int, int)’: user.cpp:21:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[l1][c1]&&a[l2][c2]) if(a[q][p]<=k1||a[q][p]>=k2) return 1; ^ user.cpp:19:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[l2][c2]) if(a[q][p]>=k2&&a[q][p]>0) return 1; ^ user.cpp:17:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a[l1][c1]) if(a[q][p]<=k1&&a[q][p]>0) return 1; ^ user.cpp: In function ‘int main()’: user.cpp:48:9: warning: unused variable ‘ok’ [-Wunused-variable] int ok=1; ^ user.cpp: In function ‘int verif(int, int)’: user.cpp:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^