Compilare: user.cpp: In function ‘void readData()’: user.cpp:27:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(inFile,"r",stdin); ^ user.cpp:29:70: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d %d %d %d ", &p, &n, &m, &t, &l, &c, &k, &s); ^ user.cpp:33:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d ", &x, &y); ^ user.cpp:41:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &code[i][j]); ^ user.cpp: In function ‘void task_1()’: user.cpp:49:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(outFile,"w",stdout); ^ user.cpp: In function ‘void task_2()’: user.cpp:85:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(outFile,"w",stdout); ^ user.cpp:95:22: warning: ‘cnt’ may be used uninitialized in this function [-Wmaybe-uninitialized] ++cnt; ^