Compilare: user.cpp: In function ‘int main()’: user.cpp:110:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d%d%d", &n, &k, &f, &l, &c); ^ user.cpp:113:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &f, &l, &c); ^ user.cpp:119:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &x); ^ user.cpp:138:18: warning: ‘nrd’ may be used uninitialized in this function [-Wmaybe-uninitialized] nrd++; ^