Compilare: user.cpp: In function ‘void prefix()’: user.cpp:28:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<strlen(ss);i++) ^ user.cpp: In function ‘void cautare()’: user.cpp:43:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1,k=0;i<=strlen(text)-1;i++) ^ user.cpp:49:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k==strlen(ss)-2) ^ user.cpp: In function ‘void citire()’: user.cpp:14:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin); ^ user.cpp:15:31: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(ss,sizeof(ss),stdin); ^ user.cpp:16:35: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(text,sizeof(text),stdin); ^ user.cpp: In function ‘void cautare()’: user.cpp:58:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out","w",stdout); ^