Compilare: user.cpp: In function ‘void fn(int)’: user.cpp:37:40: warning: unused variable ‘nod’ [-Wunused-variable] int i, r1, r2, nr = 0, j, sol = 0, nod, vecin; ^ user.cpp:37:45: warning: unused variable ‘vecin’ [-Wunused-variable] int i, r1, r2, nr = 0, j, sol = 0, nod, vecin; ^ user.cpp: In function ‘int main()’: user.cpp:87:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.cpp:89:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &X, &y, &z); ^ user.cpp:101:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &t); ^ user.cpp:103:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &s[i]); ^