23 lines
461 B
C
23 lines
461 B
C
extern double POWR();
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double TIMESTE(pow, a)
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double a;
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int pow;
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{ int p ;
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register double n, t, r, s;
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p = pow < 0 ? -pow : pow;
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n = 5.0;
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t = 2.0;
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if ( (p & 1) == 0 ) {r = 1.0; s = 1.0; }
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else {r = 5.0; s = 2.0; }
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p >>= 1;
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while ( p != 0 ) {
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n *= n; t *= t;
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if ( (p & 1) != 0 ) {r *= n; s *= t; }
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p >>= 1;
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}
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if (pow<0) {
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return((a/r)/s);
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} else {
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return((a*r)*s);
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}
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}
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