How do you Scanf a float?
Table of Contents
How do you Scanf a float?
1. Reading an integer and a floating point value
- #include
- int main()
- {
- int a;
- float b;
- int x = scanf(“\%d\%f”, &a, &b);
- printf(“Decimal Number is : \%d\n”,a);
How do I read doubles in Scanf?
To read a double, supply scanf with a format string containing the conversion specification \%lf (that’s a lower case L, not a one), and include a double variable preceded by an ampersand as the second parameter.
How do I read a line in scanf?
- We can make scanf() to read a new line by using an extra “\n”, i.e., scanf(“\%d\n”, &x) . In fact scanf(“\%d “, &x) also works (Note extra space).
- We can add a getchar() after scanf() to read an extra newline.
What is a float vs double?
Float vs Double: Head to head comparison
| Float | Double |
|---|---|
| Single precision value | Double precision value |
| Can store Up to 7 significant digits | Stores up to 15 significant digits |
| Occupies 4 bytes of memory (32 bits IEEE 754) | Occupies 8 bytes of memory (64-bits IEEE 754) |
What is the difference between float and double?
A Double and Float are both used to represent decimal numbers, but they do so in slightly different ways. For Float this means that it only has four decimal places while Double still has twelve.
How to scan the second value in printf?
Please find the discussion here : Correct format specifier for double in printf Use this line of code when scanning the second value: scanf (” \%lf”, &b); also replace all \%ld with \%lf. It’s a problem related with input stream buffer.
What is the use of \%*s in scanf?
Explanation: The \%*s in scanf is used to ignore some input as required. In this case, it ignores the input until the next space or new line. Similarly if you write \%*d it will ignore integers until the next space or new line. The above fact may not seem as an useful trick at the first glance.
What is the correct format specifier for double in printf?
Format specifier in printf should be \%f for doubl datatypes since float datatyles eventually convert to double datatypes inside printf. There is no provision to print float data. Please find the discussion here : Correct format specifier for double in printf
How to scan two values at the same time?
Use this line of code when scanning the second value: scanf (” \%lf”, &b); also replace all \%ld with \%lf. It’s a problem related with input stream buffer. You can also use fflush (stdin); after the first scanning to clear the input buffer and then the second scanf will work as expected.