Compilare: user.cpp: In function ‘void readFile()’: user.cpp:39:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘bool pos(int)’: user.cpp:112:13: warning: unused variable ‘p’ [-Wunused-variable] int p, u; ^ user.cpp:112:16: warning: unused variable ‘u’ [-Wunused-variable] int p, u; ^ user.cpp: In function ‘void build()’: user.cpp:175:9: warning: unused variable ‘nod’ [-Wunused-variable] int nod = 0; ^ user.cpp:176:9: warning: unused variable ‘p2’ [-Wunused-variable] int p2=0; ^ user.cpp: In function ‘int main()’: user.cpp:250:16: warning: suggest parentheses around assignment used as truth value [-Wparentheses] viz[i] = que[i] = 0; ^