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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. enum { NLOTTERY = 6 }; // number of lottery numbers
  6.  
  7. // read line from `stream`
  8. // fail if input line is too long (larger than maxsize)
  9. // return < 0 on error
  10. // return 0 on success
  11. static int readline(FILE* stream, char *line, size_t maxsize) {
  12.   char *s = NULL;
  13.   if ((s = fgets(line, maxsize, stream)) == NULL || strlen(s) == (maxsize-1))
  14.     // can't read from stream or line is too long
  15.     return -1;
  16.   return 0;
  17. }
  18.  
  19. int main() {
  20.   FILE* fp = stdin; // read from stdin
  21.  
  22.   // read number of records
  23.   char line[BUFSIZ];
  24.   if (readline(fp, line, sizeof(line)) < 0) {
  25.     perror("readline: n");
  26.     exit(EXIT_FAILURE);
  27.   }
  28.   int n = -1;
  29.   n = atoi(line); //note: ignore errors
  30.  
  31.   // process records
  32.   int i = 0;
  33.   for ( ; i < n; ++i) {
  34.     // read first, last name
  35.     if (readline(fp, line, sizeof(line)) < 0) {
  36.       perror("readline: first, last name");
  37.       exit(EXIT_FAILURE);
  38.     }
  39.     char firstname[sizeof(line)], lastname[sizeof(line)];
  40.     if (sscanf(line, "%s %s", firstname, lastname) != 2) {
  41.       // there must be exactly two words in the line
  42.       perror("sscanf: firstname, lastname");
  43.       exit(EXIT_FAILURE);
  44.     }
  45.  
  46.     // lottery numbers
  47.     if (readline(fp, line, sizeof(line)) < 0) {
  48.       perror("readline: lottery numbers");
  49.       exit(EXIT_FAILURE);
  50.     }
  51.     char* token = NULL, *saveptr = NULL;
  52.     char* str = line;
  53.     int numbers[NLOTTERY];
  54.     size_t j = 0;
  55.     for ( ; j < sizeof(numbers)/sizeof(*numbers); ++j, str=NULL) {
  56.       if ((token = strtok_r(str, " ", &saveptr)) == NULL)
  57. 	break;
  58.       numbers[j] = atoi(token); //NOTE: ignore errors, else use strtol()
  59.       if (numbers[j] < 0 || numbers[j] > 53) {
  60. 	fprintf(stderr, "error: number is not in range %d\n", numbers[j]);
  61. 	exit(EXIT_FAILURE);
  62.       }
  63.     }
  64.     if (j != sizeof(numbers)/sizeof(*numbers)) {
  65.       // there must be exactly NLOTTERY numbers in the line
  66.       fprintf(stderr, "error: %s\n", "strtok_r");
  67.       exit(EXIT_FAILURE);
  68.     }
  69.  
  70.     //
  71.     printf("first name: %s\tlast name: %s\t numbers: ", firstname, lastname);
  72.     for (j = 0; j < sizeof(numbers)/sizeof(*numbers); ++j)
  73.       printf("%d ", numbers[j]);
  74.     puts("");
  75.   }
  76.   exit(EXIT_SUCCESS);
  77. }
  78.  
Success #stdin #stdout 0.02s 1724KB
comments (?)
stdin
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2
Joe Flacco
1 3 5 6 7 8
Tom Brady
7 9 10 15 52 53
stdout
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first name: Joe	last name: Flacco	 numbers: 1 3 5 6 7 8 
first name: Tom	last name: Brady	 numbers: 7 9 10 15 52 53
https://ideone.com/2VAh3
language:
C (gcc 8.3)
created:
12 years ago
visibility:
secret

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