Compilare: user.cpp: In function ‘int main()’: user.cpp:32:18: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(valid && line[i]==':' || line[i]==',')dpv*=-1; ^ user.cpp:14:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("convertor.out","w",stdout); ^ user.cpp:20:15: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(line); ^ user.cpp:48:15: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(line); ^ /tmp/ccRZMCuR.o: In function `main': user.cpp:(.text.startup+0x66): warning: the `gets' function is dangerous and should not be used.