Compilare: user.cpp: In function ‘int main()’: user.cpp:26:23: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while('a' <= prev && prev <= 'z' || 'a' <= c && c <= 'z'){ ^ user.cpp:44:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < ind[1].size(); j++) ^ user.cpp:41:9: warning: variable ‘best’ set but not used [-Wunused-but-set-variable] int best, nr; ^ user.cpp: In function ‘char nextch()’: user.cpp:10:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fi); ^ user.cpp: In function ‘int main()’: user.cpp:26:23: warning: ‘prev’ may be used uninitialized in this function [-Wmaybe-uninitialized] while('a' <= prev && prev <= 'z' || 'a' <= c && c <= 'z'){ ^