Compilare: user.c: In function ‘main’: user.c:15:40: warning: variable ‘vLength’ set but not used [-Wunused-but-set-variable] long long A, B, elements, tens, sum=0, vLength, i, k=-1; ^ user.c:20:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &A); ^ user.c:21:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &B); ^