Eroare de compilare: user.cpp: In function ‘void fill(int, int)’: user.cpp:54:25: warning: NULL used in arithmetic [-Wpointer-arith] if(*it==NULL) ^ user.cpp: In function ‘int main()’: user.cpp:67:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<strlen(s);j++){ ^ user.cpp:89:5: error: ‘p’ was not declared in this scope p=u=1; ^ user.cpp:89:7: error: ‘u’ was not declared in this scope p=u=1; ^ user.cpp:64:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&n,&m,&k); ^ user.cpp:66:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",s); ^