Compilare: user.cpp: In function ‘int main()’: user.cpp:10:17: warning: unused variable ‘cnt’ [-Wunused-variable] int n,m,k=0,cnt=0,j,index = 0; ^ user.cpp:13:39: 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:14:41: 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:16:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s%s",sir_total+1,sir_comparat+1); ^ user.cpp:52:25: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] j = KMP[j-1]; ^