BEAUTY AND PLAY
#include <stdio.h> cbs () { unsigned int v; /* count the number of bits set in v */ unsigned int c; /* c accumulates the total bits set in v */ printf(“Enter v”); scanf(“%u”,&v); for (c = 0; v ; c++) { v = v & (v – 1); /* clear the least significant bit …
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/* detect if two integers have opposite signs */ #include <stdio.h> int x , y; typedef int bool; bool f; int sdetect(x , y) { f = ((x ^ y) < 0); if ( f == 1 ) { printf(“They have opposite signs\n”); } else { printf(“They have same signs\n”); } }
#include <stdio.h> #include <stdlib.h> #include <postgresql/libpq-fe.h> int main(int argc, char **argv) { const char *conninfo; const char *serverversion; PGconn *conn; const char *paramtext = “server_version”; conninfo = “hostaddr = 127.0.0.1 dbname = test user = earl password = bigshot”; conn = PQconnectdb(conninfo); if ( PQstatus(conn) != CONNECTION_OK ) { printf(“Unable to establish connection: %s”,PQerrorMessage(conn)); return …
$fping 192.168.0.1 192.168.0.1 is alive $fping 192.168.0.2 ICMP Host Unreachable from 192.168.0.103 for ICMP Echo sent to 192.168.0.2 ICMP Host Unreachable from 192.168.0.103 for ICMP Echo sent to 192.168.0.2 ICMP Host Unreachable from 192.168.0.103 for ICMP Echo sent to 192.168.0.2 ICMP Host Unreachable from 192.168.0.103 for ICMP Echo sent to 192.168.0.2 192.168.0.2 is unreachable $fping …
ABOUT httping httping – measure the latency and throughput of a webserver A TYPICAL SHELL SESSION [bash] $httping www.beautifulwork.org PING www.beautifulwork.org:80 (www.beautifulwork.org): connected to 80.79.116.205:80 (490 bytes), seq=0 time=809.49 ms connected to 80.79.116.205:80 (490 bytes), seq=1 time=807.21 ms connected to 80.79.116.205:80 (490 bytes), seq=2 time=788.23 ms connected to 80.79.116.205:80 (490 bytes), seq=3 time=796.85 ms ^CGot …
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#include <stdio.h> #include <stdlib.h> static inline int little_endian() { int endian = 1; return (0 == (*(char *)&endian)); } int main (int argc, char **argv) { printf(“This machine is “); little_endian() ? printf(“little”) : printf(“big”); printf(” endian\n”); exit(0); }
#include <stdio.h> int main() { typedef int bool; bool f; /* conditional flag */ unsigned int m; /* the bit mask */ unsigned int w; /* the word to modify: if (f) w |= m; else w &= ~m; */ printf(“Enter the word to modify “); scanf(“%u”,&w); printf(“Enter the bit mask “); scanf(“%u”,&m); /* w …
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$gcc counting-bits-set-naive-way-related.c $./a.out Enter v 8474578 Total bits set in v is 11 $./a.out Enter v 1 Total bits set in v is 1 $./a.out Enter v 2 Total bits set in v is 1 $./a.out 3 Enter v a Total bits set in v is 0 $cat counting-bits-set-naive-way-related.c #include <stdio.h> int main() { unsigned …
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