I was able to complete the extra credit challenge without using atoi() anywhere. Is this problematic in the long run or is my compiler doing something here?
1 #include <stdio.h>
2 #include "dbg.h"
3 #include <stdlib.h>
4
5 #define MAX_DATA 100
6
7 // provides corresponding int values for the const char *EYE_COLOR_NAMES[]
8 // changing the order of these will fuck up the order of the color names
9 typedef enum EyeColor {
10 BLUE_EYES,
11 GREEN_EYES,
12 BROWN_EYES,
13 BLACK_EYES,
14 OTHER_EYES
15 } EyeColor;
16
17 // seems like a hash table or a dict would be better
18 const char *EYE_COLOR_NAMES[] = {
19 "Blue",
20 "Green",
21 "Brown",
22 "Black",
23 "Other"
24 };
25
26 typedef struct Person {
27 int age;
28 char first_name[MAX_DATA];
29 char last_name[MAX_DATA];
30 EyeColor eyes;
31 float income;
32 } Person;
33
34 int main(int argc, char* argv[]) {
35 Person you = {.age = 0};
36 int i = 0;
37 char *in = NULL;
38
39 printf("What's your first name? ");
40 in = fgets(you.first_name, MAX_DATA - 1, stdin);
41 check(in != NULL, "Failed to read first name.");
42
43 printf("What's your last name? ");
44 in = fgets(you.last_name, MAX_DATA - 1, stdin);
45 check(in != NULL, "Failed to read last name.");
46
47 printf("How old are you? ");
48 int rc = scanf("%d", &you.age);
49 check(rc > 0, "You have to enter a number.");
50
51 printf("What color are your eyes?\n");
52 for(i = 0; i < OTHER_EYES; i++) {
53 printf("%d) %s\n", i + 1, EYE_COLOR_NAMES[i]);
54 }
55 printf("> ");
56
57 int eyes = -1;
58 rc = scanf("%d", &eyes);
59 check(rc > 0, "You have to enters a number.");
60
61 you.eyes = eyes - 1;
62 check(you.eyes <= OTHER_EYES && you.eyes >= 0, "Do it right, that is not an option.");
63
64 printf("How much do you make an hour? ");
65 rc= scanf("%f", &you.income);
66 check(rc > 0, "Enter a floating point number.");
67
68 printf("----- RESULTS -----\n");
69
70 printf("First name: %s", you.first_name);
71 printf("last name: %s", you.last_name);
72 printf("Age: %d\n", you.age);
73 printf("Eyes: %s\n", EYE_COLOR_NAMES[you.eyes]);
74 printf("Income: %.2f\n", you.income);
75
76 return 0;
77 error:
78 return -1;
79 }
