Compilare: user.cpp: In function ‘void LIS()’: user.cpp:32:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j ; ^ user.cpp: In function ‘void constr()’: user.cpp:60:13: warning: unused variable ‘j’ [-Wunused-variable] int i , j, poz, nr, len; ^ user.cpp:60:21: warning: unused variable ‘nr’ [-Wunused-variable] int i , j, poz, nr, len; ^ user.cpp:60:25: warning: unused variable ‘len’ [-Wunused-variable] int i , j, poz, nr, len; ^ user.cpp: In function ‘void read()’: user.cpp:18:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(hFileIn , "%d" , &n); //read n ^ user.cpp:22:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(hFileIn , "%d" , &a[i]); //read n ^