Random line selector added

random.c

@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+#include <string.h>
+
+#define MAX_LINES 200
+#define LINEBUF 1024
+
+int main() {
+	char* lines[MAX_LINES];
+	int n = 0;
+	char buf[LINEBUF];
+	char* line;
+	int len;
+
+	//Read first line
+	line = fgets(buf, LINEBUF, stdin);
+	while(line != NULL && n < MAX_LINES) {
+		//Get len of line
+		len = strlen(line);
+		//Create space for line
+		char* linecpy = malloc(len+1);
+		//Copy line
+		strcpy(linecpy,line);
+		//Add line to array.
+		lines[n++] = linecpy;
+
+		//Read next line
+		line = fgets(buf, LINEBUF, stdin);
+	}
+
+	if(n > 0) {
+		//Prepare random seed
+		srand(time(NULL)*getpid());
+
+		//Generate random number
+		int r = rand() % n;
+
+		//Print random line
+		fputs(lines[r],stdout);
+
+		//Free all lines.
+		int i;
+		for(i = 0; i < n; i++) {
+			free(lines[i]);
+		}
+	}
+
+	return 0;
+}