Compilare: user.cpp: In function ‘void rsw()’: user.cpp:111:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresii.out", "w", stdout); ^ user.cpp:112:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &t); ^ user.cpp:113:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] while (t --) ^ user.cpp:118:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] n = strlen(s); ^ /tmp/ccWoKLOO.o: In function `rsw()': user.cpp:(.text+0x4b2): warning: the `gets' function is dangerous and should not be used.