Compilare: user.cpp: In function ‘void preKMP(char*)’: user.cpp:15:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<strlen(pattern);++i) ^ user.cpp: In function ‘int main()’: user.cpp:33:34: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[2000005]’ [-Wformat=] scanf("%s\n%s",&pattern,&text); ^ user.cpp:33:34: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[2000005]’ [-Wformat=] user.cpp:44:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<strlen(text);++i) ^ user.cpp:49:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == strlen(pattern)-1) ^ user.cpp:58:34: 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:58:19: 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:33:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n%s",&pattern,&text); ^