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In C programming language, %d and %i are format specifiers as where %d specifies the type of variable as decimal and %i specifies the type as integer. In usage terms, there is no difference in printf() function output while printing a number using %d or %i but using scanf the difference occurs. scanf() function detects base using %i but assumes base 10 using %d.
Here 010 is an octal number. scanf read the number as 10 using %d and read the number as 8 using %i. printf is good in both case to read the number as octal.
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Now, let's delve into the concepts covered in the provided article:
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C Programming Language:
- The article discusses concepts related to the C programming language, indicating a focus on low-level programming and system-level development.
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Format Specifiers - %d and %i:
- In C, %d and %i are format specifiers used in functions like
printfandscanf. These specifiers define how the corresponding arguments should be formatted or interpreted. - Both %d and %i are used for formatting integers, and in the context of
printf, there is no difference in the output when printing a number using either specifier.
- In C, %d and %i are format specifiers used in functions like
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printf() Function:
- The
printf()function in C is used for formatted output. It takes a format string as an argument, containing format specifiers like %d and %i, and outputs formatted text.
- The
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scanf() Function:
- The
scanf()function in C is used for reading input. It also takes a format string with specifiers (%d and %i in this case) to interpret the input correctly.
- The
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Difference in scanf() Behavior:
- The article highlights a difference in behavior between %d and %i when used with the
scanf()function. - Specifically, when reading an octal number (e.g., 010),
%dassumes base 10, while%idetects the base and reads the number as octal.
- The article highlights a difference in behavior between %d and %i when used with the
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Octal Numbers:
- The example with "010" emphasizes the octal representation in C. In C, a leading '0' indicates an octal number.
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printf() for Octal Numbers:
- The article mentions that
printfbehaves correctly in both cases (%d and %i) when reading and printing octal numbers.
- The article mentions that
Understanding the nuances of format specifiers (%d and %i), the behavior of scanf() with octal numbers, and the consistent behavior of printf() contributes to effective C programming, ensuring accurate input/output operations.
