Eroare de compilare: user.cpp: In function ‘void constructie_pi()’: user.cpp:10:22: error: ‘strlen’ was not declared in this scope int k(0),N(strlen(S1)-1),i; ^ user.cpp: In function ‘int main()’: user.cpp:25:14: error: ‘strlen’ was not declared in this scope S1[strlen(S1)-1]=S2[strlen(S2)-1]=0; ^ user.cpp:20:34: 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:21:36: 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:22:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(S1+1,maxN,stdin); ^ user.cpp:23:24: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(S2+1,maxN,stdin); ^