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/* ------------------------------------------------------------------ */
/* Decimal Number Library Demonstration program */
/* ------------------------------------------------------------------ */
/* Copyright (c) IBM Corporation, 2001, 2007. All rights reserved. */
/* ----------------------------------------------------------------+- */
/* right margin -->| */
// example8.c -- using decQuad with the decNumber module
// compile: example8.c decContext.c decQuad.c
// and: decNumber.c decimal128.c decimal64.c
#include "decQuad.h" // decQuad library
#include "decimal128.h" // interface to decNumber
#include <stdio.h> // for printf
int main(int argc, char *argv[]) {
decQuad a; // working decQuad
decNumber numa, numb; // working decNumbers
decContext set; // working context
char string[DECQUAD_String]; // number->string buffer
if (argc<3) { // not enough words
printf("Please supply two numbers for power(2*a, b).\n");
return 1;
}
decContextDefault(&set, DEC_INIT_DECQUAD); // initialize
decQuadFromString(&a, argv[1], &set); // get a
decQuadAdd(&a, &a, &a, &set); // double a
decQuadToNumber(&a, &numa); // convert to decNumber
decNumberFromString(&numb, argv[2], &set);
decNumberPower(&numa, &numa, &numb, &set); // numa=numa**numb
decQuadFromNumber(&a, &numa, &set); // back via a Quad
decQuadToString(&a, string); // ..
printf("power(2*%s, %s) => %s\n", argv[1], argv[2], string);
return 0;
} // main
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