Compilare: user.cpp: In function ‘void rec(int, int, int)’: user.cpp:19:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(i==1 && j==1) ^ user.cpp:16:9: warning: unused variable ‘aux’ [-Wunused-variable] int aux;suma+=a[i][j]; ^ user.cpp: In function ‘void cerinta_1()’: user.cpp:37:13: warning: unused variable ‘ii’ [-Wunused-variable] int i,j,ii; ^ user.cpp: In function ‘void rec2(int, int, int)’: user.cpp:55:9: warning: unused variable ‘sumaprec’ [-Wunused-variable] int sumaprec=suma; ^ user.cpp:56:9: warning: unused variable ‘aux’ [-Wunused-variable] int aux;suma+=a[i][j]; ^ user.cpp: In function ‘void cerinta_2()’: user.cpp:112:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();++i) ^