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Length: 1024 (0x400)
Types: TextFile
Names: »SIEVE.C«
└─⟦23f778bf6⟧ Bits:30005378 BDS C v1.46 & Pascal/MT+ v5.5 (Callan format)
└─⟦this⟧ »SIEVE.C«
└─⟦4ada80662⟧ Bits:30005446 Pascal/MT+ v5.5 & XREF & BDS C v1.46
└─⟦this⟧ »SIEVE.C«
/*
Sieve of Eratosthenes benchmark from BYTE, Sep. '81, pg. 186.
Compile by:
A>cc1 sieve.c -e1000
All variables have been made external to speed them up; other than
that one change, the program is identical to the one used in the BYTE
benchmark....while they got an execution time of 49.5 seconds and a
size of 3932 bytes using v1.32 of the compiler,
********
v1.45 clocks in at * 15.2 * seconds with a size of 3718 bytes!
********
*/
#define TRUE 1
#define FALSE 0
#define SIZE 8190
#define SIZEPL 8191
char flagsÆSIZEPLÅ;
int i,prime,k,count,iter;
main()
æ
printf("Hit return to do 10 iterations: ");
getchar();
for (iter = 1; iter <= 10; iter++) æ
count = 0;
for (i = 0; i <= SIZE; i++)
flagsÆiÅ = TRUE;
for (i = 0; i <= SIZE; i++) æ
if (flagsÆiÅ) æ
prime = i + i + 3;
k = i + prime;
while (k <= SIZE) æ
flagsÆkÅ = FALSE;
k += prime;
å
count++;
å
å
å
printf("Ø7Øn%d primes.Øn",count);
å
«eof»