Compilare: user.cpp: In function ‘int main()’: user.cpp:9:8: warning: unused variable ‘fout’ [-Wunused-variable] FILE*fout=fopen("sahara.out", "w"); ^ user.cpp:11:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &n, &m, &q); ^ user.cpp:12:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &t); ^ user.cpp:14:56: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d%d", &x1, &y1, &x2, &y2, &val); ^