Compilare: user.cpp: In function ‘void desc(int)’: user.cpp:77:17: warning: unused variable ‘y’ [-Wunused-variable] int i, exp, y = x; ^ user.cpp: In function ‘void read()’: user.cpp:33:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("coduri.in", "r", stdin); ^ user.cpp:34:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:38:24: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s + 1); ^ user.cpp: In function ‘void write()’: user.cpp:117:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("coduri.out", "w", stdout); ^ /tmp/ccZwjNm1.o: In function `read()': user.cpp:(.text+0x11f): warning: the `gets' function is dangerous and should not be used.