Compilare: user.cpp: In function ‘int main()’: user.cpp:8:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j, k; ^ user.cpp:8:12: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k; ^ user.cpp:12:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &t); ^ user.cpp:16:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^