mirror of
https://github.com/RobTillaart/Arduino.git
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82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
// FILE: print_sci.ino
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// AUTHOR: Rob Tillaart
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// PURPOSE: demo program SCI
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#include "printHelpers.h"
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void setup()
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{
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Serial.begin(115200);
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Serial.println(__FILE__);
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Serial.println(sizeof(float));
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Serial.println(sizeof(double));
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double c = 2.99792458E8; // speed of light;
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double m = 7.34767309E20; // mass of moon
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double E = m * c * c;
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Serial.println();
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Serial.println(" Mass moon M = 7.34767309E+20");
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Serial.println("Speed of light c = 2.99792458E+8");
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Serial.println(" Print E = Mc^2 = 6.6037592413026551656653076E+37 \n");
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Serial.print(" normal print:\t");
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Serial.println(E, 4);
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Serial.println("Cannot handle floats / doubles > MAXLONG\n");
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#if defined(ARDUINO_ARCH_AVR)
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char buffer[200];
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Serial.print("dtostrf print:\t");
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Serial.println(dtostrf(E, 4, 4, buffer));
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Serial.println("Has no scientific notation\n");
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Serial.print("dtostre print:\t");
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Serial.println(dtostre(E, buffer, 4, 0 ));
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Serial.print("dtostre print:\t");
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Serial.println(dtostre(E, buffer, 16, 0 ));
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Serial.println("Limited to 7 decimals\n");
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#endif
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Serial.print(" sci print:\t");
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Serial.println(sci(E, 4));
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Serial.print(" sci print:\t");
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Serial.println(sci(E, 16));
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Serial.println("limited only by precision float\n");
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Serial.print(" eng print:\t");
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Serial.println(eng(E, 4));
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Serial.print(" eng print:\t");
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Serial.println(eng(E, 16));
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Serial.println("limited only by precision float\n");
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E /= 100; // more interesting effect
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Serial.println("scieng() is not meant to use directly");
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Serial.println("it works well up exponent multiple of 1..9");
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Serial.println("some values for em have their esthetics too.\n");
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for (int em = 1; em < 10; em++)
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{
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Serial.print(em);
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Serial.print("\t");
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Serial.println(scieng(E, 8, em));
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}
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Serial.println("\ndone...");
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}
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void loop()
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{
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}
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// -- END OF FILE --
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