Compilare: main.cpp: In function 'int main()': main.cpp:142:13: warning: unused variable 'xx' [-Wunused-variable] int xx=acc[i].size(); ^~ main.cpp:143:13: warning: unused variable 'yy' [-Wunused-variable] int yy=acct[i].size(); ^~ main.cpp:144:13: warning: unused variable 'k' [-Wunused-variable] int k=0; ^ main.cpp:148:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(acc[i].size()+acct[i].size()==nrctc+1) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~ main.cpp:152:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(acc[i].size()+acct[i].size()==nrctc+1) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~ main.cpp:97:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.in","r",stdin); ^ main.cpp:98:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.out","w",stdout); ^ main.cpp: In function 'char getChar()': main.cpp:15:28: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(BUF,LIM,1,stdin); ^