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#include <conio.h>
#include "bignum.h"
bignum(big1M) = BIG_1M;
bignum(big100M) = BIG_100M;
bignum(big1B) = BIG_1B;
/*
Requires a bit of explanation. b's value will always be zero or
positive, and can range up to 1.0e+14 (aka 100 trillion).
magnitude values:
0 - result is used as-is (result range 0 - 999999)
b range 0 - 999999
1 - result is in 100000's, print result/10 Million (range 0-9999)
b range 1,000,000 - 999,999,999 (999 Million)
2 - result is in 100 millions, print result/10 Billion (range 0-9999)
b range 1,000,000,000 (1 Billion) - 999,999,999,999 (1 trillion - 1)
The calling code decides whether or not to print a decimal point
and 10ths digit (using integer math only).
*/
unsigned long cformat_big(char *magnitude, bignump b) {
bignum(tmp);
unsigned long ret;
if(big_cmp(b, big1M) < 0) {
*magnitude = 0;
big_to_ulong(b, &ret);
} else if(big_cmp(b, big1B) < 0) {
*magnitude = 1;
big_to_ulong(b, &ret);
ret /= 100000L;
} else {
*magnitude = 2;
big_div(tmp, b, big100M);
big_to_ulong(tmp, &ret);
}
return ret;
}
void cprintfancy_big(bignump b) {
char m;
unsigned long l = cformat_big(&m, b);
if(!m) {
cprintf("%lu", l);
} else {
if(l > 100) {
cprintf("%lu ", l / 10L);
} else {
cprintf("%lu.%lu ", l / 10L, l % 10L);
}
cputc(m == 1 ? 'M' : 'B');
cputs("illion");
}
cputs("\r\n");
}
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