Compilare: user.cpp: In function ‘int binar()’: user.cpp:40:27: warning: right operand of comma operator has no effect [-Wunused-value] hi = n/k + 1, lo = 1, mid; ^ user.cpp: In function ‘int main()’: user.cpp:54:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d %d %d %d ", &p, &n, &m, &t); ^ user.cpp:56:49: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d %d", &d[i].first, &d[i].second); ^ user.cpp:60:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &l); ^ user.cpp:64:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &q); ^ user.cpp:67:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &k); ^