Compilare: user.c: In function ‘main’: user.c:11:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &N); ^ user.c:12:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &vectoras[0]); ^ user.c:13:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &vectoras[1]); ^ user.c:22:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &vectoras[i]); ^ user.c:42:57: warning: ‘pos3’ may be used uninitialized in this function [-Wmaybe-uninitialized] S2 = S - (vectoras[pos3-2] + vectoras[pos3-1] + vectoras[pos3]) + max3; ^ user.c:41:79: warning: ‘pos2’ may be used uninitialized in this function [-Wmaybe-uninitialized] S1 = S - (vectoras[pos1] + vectoras[pos1-1]) - (vectoras[pos2] + vectoras[pos2-1]) + max1 + max2; ^