Scientific Notation
By M.C. Pinto, UNILA 
Brazil
By M.C. Pinto, UNILA Brazil
Floating point numbers can be very long to show. In these cases, it is convenient to use the scientific notation.
You must write a program that, given a floating point number, shows this number in scientific notation: always show the mantissa sign; always show the mantissa with 4 decimal places; use the character 'E' between the mantissa and the exponent; always show the exponent sign; and show the exponent with at least 2 digits.
The input is a double precision floating point number X (according to the IEEE 754-2008 standard). There will never be a number with more than 110 characters long and more than 6 decimal places.
The output is the number X in a single line using the scientific notation detailed above. See the examples below.
| Input Samples | Output Samples |
|
3.141592 |
+3.1416E+00 |
|
1.618033 |
+1.6180E+00 |
|
602214085774747474747474 |
+6.0221E+23 |
|
-0.000027 |
-2.7000E-05 |
|
-10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 |
-1.0000E+100 |