Mar 06, 2011 Didn't notice that line. In that case, you ought to also use cstdlib instead of stdlib.h Though TBH, if you are writing C you should just use the C libraries instead of the C standard library. 16 rows additional arguments − Depending on the format string, the function may expect a sequence. The printf function prints output to stdout, according to format and other arguments passed to printf.The string format consists of two types of items - characters that will be printed to the screen, and format commands that define how the other arguments to printf are displayed.
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- The C Standard Library
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Type Qualifying Input Type of argument; c: Single character: Reads the next character. If a width different from 1 is specified, the function reads width characters and stores them in the successive locations of the array passed as argument. Aug 31, 2009 comoo le ago para ingresa un numero y me salga con letra para dev c. Bueno, printf y scanf son funciones de C y cout y cin son funciones de C. Jun 12, 2010 console output formatting. Console output formatting. I am sorry, but I need a quick help what would be analog to this function in C to C printf('%5d', var) cout printf('%5d', var) will work in C. Most C functions, at least all C functions i know, work in C.
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Description
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The C library function int scanf(const char *format, ...) reads formatted input from stdin.
Declaration
Following is the declaration for scanf() function.
Parameters
- format − This is the C string that contains one or more of the following items −Whitespace character, Non-whitespace character and Format specifiers. A format specifier will be like [=%[*][width][modifiers]type=] as explained below −
Sr.No. | Argument & Description |
---|---|
1 | * This is an optional starting asterisk indicates that the data is to be read from the stream but ignored, i.e. it is not stored in the corresponding argument. |
2 | width This specifies the maximum number of characters to be read in the current reading operation. |
3 | modifiers Specifies a size different from int (in the case of d, i and n), unsigned int (in the case of o, u and x) or float (in the case of e, f and g) for the data pointed by the corresponding additional argument: h : short int (for d, i and n), or unsigned short int (for o, u and x) l : long int (for d, i and n), or unsigned long int (for o, u and x), or double (for e, f and g) L : long double (for e, f and g) |
4 | type A character specifying the type of data to be read and how it is expected to be read. See next table. |
fscanf type specifiers
type | Qualifying Input | Type of argument |
---|---|---|
c | Single character: Reads the next character. If a width different from 1 is specified, the function reads width characters and stores them in the successive locations of the array passed as argument. No null character is appended at the end. | char * |
d | Decimal integer: Number optionally preceded with a + or - sign | int * |
e, E, f, g, G | Floating point: Decimal number containing a decimal point, optionally preceded by a + or - sign and optionally followed by the e or E character and a decimal number. Two examples of valid entries are -732.103 and 7.12e4 | float * |
o | Octal Integer: | int * |
s | String of characters. This will read subsequent characters until a whitespace is found (whitespace characters are considered to be blank, newline and tab). | char * |
u | Unsigned decimal integer. | unsigned int * |
x, X | Hexadecimal Integer | int * |
- additional arguments − Depending on the format string, the function may expect a sequence of additional arguments, each containing one value to be inserted instead of each %-tag specified in the format parameter, if any. There should be the same number of these arguments as the number of %-tags that expect a value.
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Return Value
On success, the function returns the number of items of the argument list successfully read. If a reading error happens or the end-of-file is reached while reading, the proper indicator is set (feof or ferror) and, if either happens before any data could be successfully read, EOF is returned.
Example
The following example shows the usage of scanf() function.
![Comando printf dev c pdf Comando printf dev c pdf](/uploads/1/2/6/2/126285274/945982178.jpg)
Let us compile and run the above program that will produce the following result in interactive mode −
![Printf Printf](/uploads/1/2/6/2/126285274/159776225.jpg)
- The C Standard Library
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Description
The C library function int printf(const char *format, ...) sends formatted output to stdout.
Declaration
Following is the declaration for printf() function.
Parameters
- format − This is the string that contains the text to be written to stdout. It can optionally contain embedded format tags that are replaced by the values specified in subsequent additional arguments and formatted as requested. Format tags prototype is %[flags][width][.precision][length]specifier, which is explained below −
Sr.No. | Specifier & Output |
---|---|
1 | c Character |
2 | d or i Signed decimal integer |
3 | e Scientific notation (mantissa/exponent) using e character |
4 | E Scientific notation (mantissa/exponent) using E character |
5 | f Decimal floating point |
6 | g Uses the shorter of %e or %f |
7 | G Uses the shorter of %E or %f |
8 | o Signed octal |
9 | s String of characters |
10 | u Unsigned decimal integer |
11 | x Unsigned hexadecimal integer |
12 | X Unsigned hexadecimal integer (capital letters) |
13 | p Pointer address |
14 | n Nothing printed |
15 | % Character |
Sr.No. | Flags & Description |
---|---|
1 | - Left-justify within the given field width; Right justification is the default (see width sub-specifier). |
2 | + Forces to precede the result with a plus or minus sign (+ or -) even for positive numbers. By default, only negative numbers are preceded with a -ve sign. |
3 | (space) If no sign is going to be written, a blank space is inserted before the value. |
4 | # Used with o, x or X specifiers the value is preceded with 0, 0x or 0X respectively for values different than zero. Used with e, E and f, it forces the written output to contain a decimal point even if no digits would follow. By default, if no digits follow, no decimal point is written. Used with g or G the result is the same as with e or E but trailing zeros are not removed. |
5 | 0 Left-pads the number with zeroes (0) instead of spaces, where padding is specified (see width sub-specifier). |
Sr.No. | Width & Description |
---|---|
1 | (number) Minimum number of characters to be printed. If the value to be printed is shorter than this number, the result is padded with blank spaces. The value is not truncated even if the result is larger. |
2 | * The width is not specified in the format string, but as an additional integer value argument preceding the argument that has to be formatted. |
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Sr.No. | .precision & Description |
---|---|
1 | .number For integer specifiers (d, i, o, u, x, X) − precision specifies the minimum number of digits to be written. If the value to be written is shorter than this number, the result is padded with leading zeros. The value is not truncated even if the result is longer. A precision of 0 means that no character is written for the value 0. For e, E and f specifiers − this is the number of digits to be printed after the decimal point. For g and G specifiers − This is the maximum number of significant digits to be printed. For s − this is the maximum number of characters to be printed. By default all characters are printed until the ending null character is encountered. For c type − it has no effect. When no precision is specified, the default is 1. If the period is specified without an explicit value for precision, 0 is assumed. |
2 | .* The precision is not specified in the format string, but as an additional integer value argument preceding the argument that has to be formatted. |
Sr.No. | Length & Description |
---|---|
1 | h The argument is interpreted as a short int or unsigned short int (only applies to integer specifiers: i, d, o, u, x and X). |
2 | l The argument is interpreted as a long int or unsigned long int for integer specifiers (i, d, o, u, x and X), and as a wide character or wide character string for specifiers c and s. |
3 | L The argument is interpreted as a long double (only applies to floating point specifiers: e, E, f, g and G). |
- additional arguments − Depending on the format string, the function may expect a sequence of additional arguments, each containing one value to be inserted instead of each %-tag specified in the format parameter (if any). There should be the same number of these arguments as the number of %-tags that expect a value.
Return Value
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If successful, the total number of characters written is returned. On failure, a negative number is returned.
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Example
Commando Printf Dev C++
The following example shows the usage of printf() function.
Let us compile and run the above program to produce the following result −
stdio_h.htm