Compilare: main.cpp: In function 'int main()': main.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(commands)-1;++i) { ~^~~~~~~~~~~~~~~~~~~ main.cpp:10:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("editor.in","r",stdin); ^ main.cpp:11:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("editor.out","w",stdout); ^ main.cpp:13:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ main.cpp:17:38: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(commands, 60001, stdin); ^