Compilare: user.cpp: In function ‘int caut(int, int, int)’: user.cpp:32:12: warning: left operand of comma operator has no effect [-Wunused-value] return(l,mij,val); ^ user.cpp:32:16: warning: right operand of comma operator has no effect [-Wunused-value] return(l,mij,val); ^ user.cpp:34:12: warning: left operand of comma operator has no effect [-Wunused-value] return (r,mij,val); ^ user.cpp:34:16: warning: right operand of comma operator has no effect [-Wunused-value] return (r,mij,val); ^ user.cpp: In function ‘int main()’: user.cpp:53:7: warning: unused variable ‘x’ [-Wunused-variable] int n,x,i; ^