[C] Extract integer and decimal part

Hello,

You can do something like:

double x = 4.125; int partent = (int) x; // 4 double partdec = x - partent; // 0.1256

To count the number of decimals you can cheat by writing the decimal part into a string and counting the number of characters:

char buffer[255]; unsigned int nb_dec; sprintf(buffer, "%lf", partdec); nb_dec = strlen(buffer) - 2; // or something like that, the -2 is to skip the '0.'

Good luck

Hello!
Here is my solution
 

#include <math.h> float pi = 3.141592; printf( "\nFloat : %f\nInteger : %d\nDecimal : %d\n", pi, (int) pi, (int) ((pi - (int) pi) * 1000000) ); printf( "\nFloat : %f\nInteger : %d\nDecimal : %d\n", pi, (int) pi, (int) ((pi - (int) pi) * 1000) );

Result:
 

 Float : 3.141592 Integer : 3 Decimal : 141592 Float : 3.141592 Integer : 3 Decimal : 141

I want to clarify that the results can be stored in ints. (they are indeed %d in the printf!)
Enjoy! :D
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