nortega/indivisible-legacy
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Find the nth prime.

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Nicolás A. Ortega 2017-02-06 18:00:34 +01:00
parent 8ee18c8c4b
commit 94248612ba
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GPG Key ID: 614272579C2070D1
1 changed files with 15 additions and 3 deletions
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18
src/main.c
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@ -24,12 +24,13 @@ int main(int argc, char *argv[]) {
f_version = false, f_version = false,
f_quiet = false; f_quiet = false;
int base = 10; int base = 10;
size_t n_prime = 0;
char *dfile = NULL; char *dfile = NULL;
char *efile = NULL; char *efile = NULL;
// Parse commandline arguments // Parse commandline arguments
int c; int c;
while((c = getopt(argc, argv, "hvqb:f:e:")) != -1) { while((c = getopt(argc, argv, "hvqb:f:e:n:")) != -1) {
switch(c) { switch(c) {
case 'h': case 'h':
f_help = true; f_help = true;
@ -55,6 +56,14 @@ int main(int argc, char *argv[]) {
case 'e': case 'e':
efile = optarg; efile = optarg;
break; break;
case 'n':
n_prime = atoi(optarg);
if(n_prime <= 2) {
fprintf(stderr,
"`n' must be larger than 2 (first two primes are 2 and 3).\n");
return 1;
}
break;
default: default:
printUsage(argv[0]); printUsage(argv[0]);
return 1; return 1;
@ -70,7 +79,8 @@ int main(int argc, char *argv[]) {
puts(" -q quiet mode"); puts(" -q quiet mode");
puts(" -b <base> base in which to print primes between 2 and 62 (default 10)"); puts(" -b <base> base in which to print primes between 2 and 62 (default 10)");
puts(" -f <file> file in/from which primes are stored and read from in raw format"); puts(" -f <file> file in/from which primes are stored and read from in raw format");
puts(" -e <file> export input file to plain text format\n"); puts(" -e <file> export input file to plain text format");
puts(" -n <n> run until the 'n'th prime\n");
return 0; return 0;
} else if(f_version) { } else if(f_version) {
printf("Indivisible %s\n", VERSION); printf("Indivisible %s\n", VERSION);
@ -225,6 +235,8 @@ int main(int argc, char *argv[]) {
printf("\n"); printf("\n");
} }
} }
if(primes.end == n_prime) break;
} }
@ -260,7 +272,7 @@ releaseMemory:
} }
void printUsage(char *progName) { void printUsage(char *progName) {
printf("%s [[-f <file> [-e <file> | -q]] [-b <base>] | [-h] | [-v]]\n", progName); printf("%s [[-f <file> [-e <file> | -q]] [-b <base>] [-n <n>] | [-h] | [-v]]\n", progName);
} }
void leave() { run = false; } void leave() { run = false; }