Compilare: main.cpp: In function 'int main()': main.cpp:121:15: warning: unused variable 'j' [-Wunused-variable] int n,m,i,j,a,b,gunoi,t; ^ main.cpp:121:21: warning: variable 'gunoi' set but not used [-Wunused-but-set-variable] int n,m,i,j,a,b,gunoi,t; ^~~~~ main.cpp: In function 'int prima_operatie(int, int, int)': main.cpp:81:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.cpp: In function 'int modificare(int, int, int)': main.cpp:116:1: warning: control reaches end of non-void function [-Wreturn-type] } ^