Compilare: user.c: In function ‘main’: user.c:38:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input, "%d", &value1); ^ user.c:39:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input, "%d", &value2); ^ user.c: In function ‘cmmdc’: user.c:27:5: warning: ‘cmmdc’ may be used uninitialized in this function [-Wmaybe-uninitialized] return cmmdc; ^