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I have a unit conversion program that needs to take in a float and 2 strings from standard input. My previous solution was:

1. Scanf In Dev C++
2. Scanf In C++
3. How To Fscanf String From File
4. Scanf Function In Dev C++

However, this only works if the input looks like
2.54 centimeters inches

The precision modifier has different meanings depending on the format command being used: With%e,%E, and%f, the precision modifier lets you specify the number of decimal places desired.For example,%12.6f will display a floating number at least 12 digits wide, with six decimal places. With%g and%G, the precision modifier determines the maximum number of significant digits displayed. Fscanf is an I/O function similar to scanf but this function reads information from a stream. The function returns the number of items read on success, it can be zero if a matching failure occurs. If an input failure occurs before reading data could result in EOF. Developer Community for Visual Studio Product family. This site uses cookies for analytics, personalized content and ads. By continuing to browse this site, you agree to this use. Jan 30, 2017  Inbuilt library functions for user Input scanf, fscanf, sscanf, scanfs, fscanfs, sscanfs Arrow operator - in C/C with Examples Speed up Code executions with help of Pragma in C/C. Feb 03, 2017  The ‘scanf’ function reads formatted input from the stream ‘stdin’ under the control of the template string TEMPLATE. It means that scanf reads input o nly from stdin. If you started the program from an interactive shell, it will wait for user input, as stdin will be /dev/tty in that case.

1. Apr 15, 2020  I have a unit conversion program that needs to take in a float and 2 strings from standard input. My previous solution was: CODE float origquant; char.
2. Int fscanf ( FILE. stream, const char. format. ); Reads data from the stream and stores them according to the parameter format into the locations pointed by the additional arguments. The additional arguments should point to already allocated objects of the type specified by their corresponding format specifier within the format string.

A requirement for the project is that the input looks like this
2.54, centimeters, inches

I tried to change my fscanf to something like fscanf(stdin, '%f, %s, %s'..) but that didn't work. What is the easiest way I can get rid of those commas without having to read everything in character-by-character? Should I put the whole thing in a string to start and then search for the commas and remove them? Or is there a built-in function that can help me do this automatically?

Thanks,
Ross

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Change your %f, %s, %s to %f%c %s%c %s

The %c handles the ',' char, and the * modifier in front of the c, should tell fscanf(), not to store the char.

[CODE]fscanf(filePointerName, '%f%c %s%c %s ', &myFloatVariable, myString1, mySring2);[/CODE]

Sure. Think of [ICODE]%[..][/ICODE] as [ICODE]%s[/ICODE] where [I]you[/I] define the recognized alphabet. Everything inside the brackets represents your custom alphabet, which in this case is [ICODE]{' ', 't', 'n', 'r', 'v', 'f', ','}[/ICODE]. The leading caret (^) alters the behavior to one of exclusion, so [ICODE]'%[^ tnrvf,]'[/ICODE] means read characters …

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Adak419

Change your %f, %s, %s to %f%*c %s%*c %s

Scanf In Dev C++

The %c handles the ',' char, and the * modifier in front of the c, should tell fscanf(), not to store the char.

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Function scanf()

The function scanf() is used to read formatted input from stdin in C language. It returns the whole number of characters written in it otherwise, returns a negative value.

Here is the syntax of scanf() in C language,

Here is an example of scanf() in C language,

Example

Output

Function fscanf()

The function fscanf() is used to read the formatted input from the given stream in C language. It returns zero, if unsuccessful. Otherwise, it returns The input string, if successful.

Here is the syntax of fscanf() in C language,

The result is a warm and powerful sound over the entire range of the keyboard.

Scanf In C++

Here is an example of fscanf() in C language,

How To Fscanf String From File

Example

Scanf Function In Dev C++

Output