Compilare: user.cpp: In function ‘int main()’: user.cpp:70:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<strlen(s);i++) ^ user.cpp:86:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=ii+2;i<strlen(s);i++) ^ user.cpp: In function ‘void cit()’: user.cpp:11:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ecuatii2.in","r",stdin); ^ user.cpp:12:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ecuatii2.out","w",stdout); ^ user.cpp: In function ‘int main()’: user.cpp:39:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:43:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccq6dWHb.o: In function `main': user.cpp:(.text.startup+0x54): warning: the `gets' function is dangerous and should not be used.