Compilare: user.cpp: In function ‘int main()’: user.cpp:8:41: warning: unused variable ‘k’ [-Wunused-variable] int t, n, first, last, min, max, i, j, k, v[20000], ok, veryok; ^ user.cpp:8:44: warning: unused variable ‘v’ [-Wunused-variable] int t, n, first, last, min, max, i, j, k, v[20000], ok, veryok; ^ user.cpp:8:54: warning: unused variable ‘ok’ [-Wunused-variable] int t, n, first, last, min, max, i, j, k, v[20000], ok, veryok; ^ user.cpp:8:58: warning: unused variable ‘veryok’ [-Wunused-variable] int t, n, first, last, min, max, i, j, k, v[20000], ok, veryok; ^ user.cpp:10:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &t); ^ user.cpp:14:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.cpp:17:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &first); ^ user.cpp:22:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &last); ^