Compilare: user.cpp: In function ‘int main()’: user.cpp:21:9: warning: unused variable ‘k’ [-Wunused-variable] int k, j, l, r, i, n, m; ^ user.cpp:18:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("aparitii2.in", "r", stdin); ^ user.cpp:19:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("aparitii2.out", "w", stdout); ^ user.cpp:23:31: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(aux1), n=strlen(aux1); ^ user.cpp:24:31: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(aux2), m=strlen(aux2); ^ /tmp/ccArwBtB.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.