grep program
How is this program supposed to work?
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#include <stdio.h>
#include <string.h>
#define MAXLINE 10000
int get_line(char *line, int max);
/* find: print lines that match pattern from 1st arg */
int main(int argc, char *argv[])
{
char line[MAXLINE];
int found = 0;
if (argc != 2)
printf("Usage: find pattern\n");
else
while (get_line(line, MAXLINE) > 0)
if (strstr(line, argv[1]) != NULL) {
printf("%s", line);
found++;
}
return found;
}
int get_line (char s[], int lim)
{
int c, i;
for (i = 0; i<lim-1 && (c=getchar()) != EOF && c!= '\n'; ++i)
s[i] = c;
if (c == '\n') {
s[i] = c;
++i;
}
s[i] = '\0';
return i;
}
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I can compile it but have no idea how to use it.
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