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Dec 15, 2011 in other program like excel i can enter series of number and after that we can: 1. Sum them up 2. Divide them, multiple, list the highest number or smallest or whatever with number since they have some build-in F(x) and its very to use like writing in real life. In C i've been experienced little much more trouble #include void main. Entering a binary string. C / C Forums on Bytes. Pete wrote: Sorry for the ambiguity of my last post, What I am try to do is enter a 10. Abhishek Roy January 16, 2015 /.This is another approach, but this has a flaw while used in C. This code works perfectly in C language. This program uses the Algo with the least no of executable lines in C to perform the binary to decimal conversion, hence the.
- C Program to convert Decimal to Binary. We can convert any decimal number (base-10 (0 to 9)) into binary number (base-2 (0 or 1)) by C program. Decimal Number. Decimal number is a base 10 number because it ranges from 0 to 9, there are total 10 digits between 0 to 9. Any combination of digits is decimal number such as 223, 585, 192, 0, 7 etc.
- Enter a decimal number 15 Binary number = 1111 Enter a decimal number 9 Binary number = 1001 In above C program, we first take an integer as input from user and store it in variable decimal. Then we call decimalToBinary function to convert decimal function to binary number by implementing above mentioned algorithm.
C++ variables are stored internally as so-called binary numbers. Binary numbers are stored as a sequence of 1 and 0 values known as bits. Most of the time, you don’t really need to deal with which particular bits you use to represent numbers. Sometimes, however, it’s practical and convenient to tinker with numbers at the bit level — so C++ provides a set of operators for that purpose.
The so-called bitwise logical operators operate on their arguments at the bit level. To understand how they work, first examine how computers store variables.
The decimal number system
The numbers you’ve been familiar with from the time you could first count on your fingers are known as decimal numbers because they’re based on the number 10. In general, the programmer expresses C++ variables as decimal numbers. Thus you could specify the value of var as (say) 123, but consider the implications.
A number such as 123 refers to 1 * 100 + 2 * 10 + 3 * 1. All of these base numbers — 100, 10, and 1 — are powers of 10.
Expressed in a slightly different (but equivalent) way, 123 looks like this:
Remember that any number to the zero power is 1.
Other number systems
Well, okay, using 10 as the basis (or base) of our counting system probably stems from those 10 human fingers, the original counting tools. An alternative base for a counting system could just as easily have been 20.
If our numbering scheme had been invented by dogs, it might well be based on 8 (one digit of each paw is out of sight on the back part of the leg). Mathematically, such an octal system would have worked just as well:
The small 10 and 8 here refer to the numbering system, 10 for decimal (base 10) and 8 for octal (base 8). A counting system may use any positive base.
Binary Numbers From 1 To 100
The binary number system
Computers have essentially two fingers. Computers prefer counting using base 2. The number 12310 would be expressed this way:
Computer convention expresses binary numbers by using 4, 8, 16, 32, or even 64 binary digits, even if the leading digits are 0. This is also because of the way computers are built internally.
Because the term digit refers to a multiple of 10, a binary digit is called a bit (an abbreviation of binary digit). A byte is made up of 8 bits. (Calling a binary digit a byte-it didn’t seem like a good idea.) Memory is usually measured in bytes (like rolls are measured in units of baker’s dozen).
With such a small base, you have to use a large number of bits to express numbers. Human beings don’t want the hassle of using an expression such as 011110112 to express such a mundane value as 12310. Programmers prefer to express numbers by using an even number of bits.
The octal system — which is based on 3 bits — was the default binary system in the early days of C. We see a vestige of this even today — a constant that begins with a 0 is assumed to be octal in C++. Thus, the line:
produces the following output:
However, octal has been almost completely replaced by the hexadecimal system, which is based on 4-bit digits.
Hexadecimal uses the same digits for the numbers 0 through 9. For the digits between 9 and 16, hexadecimal uses the first six letters of the alphabet: A for 10, B for 11, and so on. Thus, 12310 becomes 7B16, like this:
Programmers prefer to express hexadecimal numbers in multiples of 4 hexadecimal digits even when the leading digit in each case is 0.
Finally, who wants to express a hexadecimal number such as 7B16 by using a subscript? Terminals don’t even support subscripts. Even on a word processor, it’s a drag to change fonts to and from subscript mode just to type two lousy digits.
Therefore, programmers (no fools, they) use the convention of beginning a hexadecimal number with a 0x. Thus, 7B becomes 0x7B. Using this convention, the hexadecimal number 0x7B is equal to 123 decimal while 0x123 hexadecimal is equal to 291 decimal. The code snippet
produces the following output:
You can use all the mathematical operators on hexadecimal numbers in the same way you’d apply them to decimal numbers.
If you really want to, you can write binary numbers in C++ ’14 using the prefix ‘0b’. Thus, 123 becomes 0b01111011.
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Entering A Binary Number In Dev C Download
When we say Input, it means to feed some data into a program. An input can be given in the form of a file or from the command line. C programming provides a set of built-in functions to read the given input and feed it to the program as per requirement.
Binary Number List
When we say Output, it means to display some data on screen, printer, or in any file. C programming provides a set of built-in functions to output the data on the computer screen as well as to save it in text or binary files.
The Standard Files
C programming treats all the devices as files. So devices such as the display are addressed in the same way as files and the following three files are automatically opened when a program executes to provide access to the keyboard and screen.
Standard File | File Pointer | Device |
---|---|---|
Standard input | stdin | Keyboard |
Standard output | stdout | Screen |
Standard error | stderr | Your screen |
The file pointers are the means to access the file for reading and writing purpose. This section explains how to read values from the screen and how to print the result on the screen.
The getchar() and putchar() Functions
The int getchar(void) function reads the next available character from the screen and returns it as an integer. This function reads only single character at a time. You can use this method in the loop in case you want to read more than one character from the screen.
The int putchar(int c) function puts the passed character on the screen and returns the same character. This function puts only single character at a time. You can use this method in the loop in case you want to display more than one character on the screen. Check the following example −
When the above code is compiled and executed, it waits for you to input some text. When you enter a text and press enter, then the program proceeds and reads only a single character and displays it as follows −
The gets() and puts() Functions
The char *gets(char *s) function reads a line from stdin into the buffer pointed to by s until either a terminating newline or EOF (End of File).
The int puts(const char *s) function writes the string 's' and 'a' trailing newline to stdout.
NOTE: Though it has been deprecated to use gets() function, Instead of using gets, you want to use fgets().
When the above code is compiled and executed, it waits for you to input some text. When you enter a text and press enter, then the program proceeds and reads the complete line till end, and displays it as follows −
The scanf() and printf() Functions
The int scanf(const char *format, ...) function reads the input from the standard input stream stdin and scans that input according to the format provided.
The int printf(const char *format, ...) function writes the output to the standard output stream stdout and produces the output according to the format provided.
The format can be a simple constant string, but you can specify %s, %d, %c, %f, etc., to print or read strings, integer, character or float respectively. There are many other formatting options available which can be used based on requirements. Let us now proceed with a simple example to understand the concepts better −
When the above code is compiled and executed, it waits for you to input some text. When you enter a text and press enter, then program proceeds and reads the input and displays it as follows −
Here, it should be noted that scanf() expects input in the same format as you provided %s and %d, which means you have to provide valid inputs like 'string integer'. If you provide 'string string' or 'integer integer', then it will be assumed as wrong input. Secondly, while reading a string, scanf() stops reading as soon as it encounters a space, so 'this is test' are three strings for scanf().