[C] file di testo

[athebustop]

dato un file di testo del tipo:

64 bytes from 10.1.2.202: icmp_seq=1 ttl=126 time=9.0 ms
64 bytes from 10.1.2.202: icmp_seq=2 ttl=126 time=9.6 ms
64 bytes from 10.1.2.202: icmp_seq=3 ttl=126 time=10.0 ms
64 bytes from 10.1.2.202: icmp_seq=4 ttl=126 time=10.4 ms
64 bytes from 10.1.2.202: icmp_seq=5 ttl=126 time=10.7 ms
64 bytes from 10.1.2.202: icmp_seq=6 ttl=126 time=11.1 ms
64 bytes from 10.1.2.202: icmp_seq=7 ttl=126 time=7.4 ms
64 bytes from 10.1.2.202: icmp_seq=8 ttl=126 time=7.0 ms
64 bytes from 10.1.2.202: icmp_seq=9 ttl=126 time=7.1 ms
64 bytes from 10.1.2.202: icmp_seq=10 ttl=126 time=7.0 ms
64 bytes from 10.1.2.202: icmp_seq=11 ttl=126 time=7.8 ms
64 bytes from 10.1.2.202: icmp_seq=12 ttl=126 time=8.4 ms
64 bytes from 10.1.2.202: icmp_seq=13 ttl=126 time=9.1 ms
64 bytes from 10.1.2.202: icmp_seq=14 ttl=126 time=9.7 ms
64 bytes from 10.1.2.202: icmp_seq=15 ttl=126 time=10.4 ms
64 bytes from 10.1.2.202: icmp_seq=16 ttl=126 time=10.9 ms
64 bytes from 10.1.2.202: icmp_seq=17 ttl=126 time=7.3 ms
64 bytes from 10.1.2.202: icmp_seq=18 ttl=126 time=7.9 ms
64 bytes from 10.1.2.202: icmp_seq=19 ttl=126 time=8.5 ms
64 bytes from 10.1.2.202: icmp_seq=20 ttl=126 time=8.9 ms
64 bytes from 10.1.2.202: icmp_seq=21 ttl=126 time=9.3 ms
64 bytes from 10.1.2.202: icmp_seq=22 ttl=126 time=18.2 ms

vorrei attraverso un programmino in C ottenere un altro file di testo contenente un elenco di valori pescati uno dopo l'altro dal campo time del tipo:

9
9,6
10
10,4
10,7
11,1
...

soluzioni?

[ball12]

con fscanf memorizzi solo %d.%d di quello che ti serve (in questo caso time)

[ilsensine]

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

int main(int argc, char **argv)
{
	FILE *f;
	char *pos;
	char line[256];
	double time;
	if(argc!=2) {
		fprintf(stderr, "%s <filename>\n", argv[0]);
		return -1;
	}
	f = fopen(argv[1], "rb");
	if(!f) {
		perror("fopen");
		return -1;
	}
	line[sizeof(line)-1] = '\0';
	while(fgets(line, sizeof(line)-1, f)) {
		pos = strstr(line, "time=");
		if(!pos) continue;
		pos += strlen("time=");
		time = atof(pos);
		printf("%.1f\n", time);
	}
	fclose(f);
	return 0;
}