محددات التحويل ومعدلاته

في هذا المنشور ، أريد إنشاء مرجع مفيد لجميع ملفاتجتحويلاتمحدداتيمكنك استخدامها بشكل شائعprintf()وscanf()ووظائف الإدخال / الإخراج المماثلة.

بالإضافة إلى تلك المحددات ، لدينا مجموعة منالصفات التعريفية.

دعنا نبدء بأرقام. باستخدام رقم بين%ومحدد التنسيق ، يمكنك معرفة الحد الأدنى لعرض الحقل. مثال:%3dسوف تأخذ 3 مسافات بغض النظر عن الرقم المطبوع.

هذه:

printf("%4d\n", 1);
printf("%4d\n", 12);
printf("%4d\n", 123);
printf("%4d\n", 1234);

يجب أن تطبع

   1
  12
 123
1234
If you put a dot before the digit, you are not telling the precision: the number of decimal digits. This of course applies to decimal numbers. Example:
printf("%4.2f\n", 1.0);
printf("%4.3e\n", 12.232432442);
printf("%4.1e\n", 12.232432442);
printf("%4.1f\n", 123.22);
will print:
1.00
1.223e+01
1.2e+01
123.2
In addition to digits, we have 3 special letters: h, l and L.

h, used with integer numbers, indicates a short int (for example %hd) or a short unsigned int (for example %hu)
l, used with integer numbers, indicates a long int (for example %ld) or a long unsigned int (for example %lu).
L, used with floating point numbers, indicates a long double, for example %Lf

  

  
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