1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(int argc, char *argv[])
{
if (argc != 2) {
printf("Usage: ./depth <input-file>\n");
exit(EXIT_FAILURE);
}
FILE *fp;
char *buffer;
ssize_t read;
size_t len = 0;
fp = fopen(argv[1], "r");
if (fp == NULL) {
perror("fopen");
exit(EXIT_FAILURE);
}
int scalar;
char *way;
int h_pos = 0, depth = 0, aim = 0;
while ((read = getline(&buffer, &len, fp)) != -1) {
sscanf(buffer, "%s %d", way, &scalar);
// printf("READ: <%s>, <%d>\n", way, scalar);
if (strncmp(way, "forward", strlen("forward")) == 0) {
// printf("GOING FORWARD\n");
h_pos += scalar;
depth += aim * scalar;
} else if (strncmp(way, "down", strlen("forward")) == 0) {
aim += scalar;
} else { /* up */
aim -= scalar;
}
}
printf("%d\n", depth * h_pos);
return 0;
}
|
