Compilare: user.cpp: In function ‘void preKMP(char*)’: user.cpp:15:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<strlen(pattern)-1;++i) ^ user.cpp: In function ‘int main()’: user.cpp:45:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<strlen(text)-1;++i) ^ user.cpp:50:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == strlen(pattern)-2) ^ user.cpp:59:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<minim(n,a.size());++i)printf("%d ",a[i]); ^ user.cpp:6:23: note: in definition of macro ‘minim’ #define minim(a,b)((a>b)?b:a) ^ user.cpp:6:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define minim(a,b)((a>b)?b:a) ^ user.cpp:59:19: note: in expansion of macro ‘minim’ for(int i=0;i<minim(n,a.size());++i)printf("%d ",a[i]); ^ user.cpp:31:37: 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:32:39: 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); ^ user.cpp:33:43: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(pattern, sizeof(pattern), stdin); ^ user.cpp:34:37: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(text, sizeof(text), stdin); ^