Sams Teach Yourself C in 21 Days

Pointers: Beyond the Basics 403

37: char buffer[80]; /* Temporary storage for each line. */ 15

38:

39: puts(“Enter one line at time; enter a blank when done.”);

40:

41: while ((n < MAXLINES) && (gets(buffer) != 0) &&

42: (buffer[0] != ‘\0’))

43: {

44: if ((lines[n] = (char *)malloc(strlen(buffer)+1)) == NULL)

45: return -1;

46: strcpy( lines[n++], buffer );

47: }

48: return n;

49:

50: } /* End of get_lines() */

51:

52: void sort(char *p[], int n)

53: {

54: int a, b;

55: char *tmp;

56:

57: for (a = 1; a < n; a++)

58: {

59: for (b = 0; b < n-1; b++)

60: {

61: if (strcmp(p[b], p[b+1]) > 0)

62: {

63: tmp = p[b];

64: p[b] = p[b+1];

65: p[b+1] = tmp;

66: }

67: }

68: }

69: }

70:

71: void print_strings(char *p[], int n)

72: {

73: int count;

74:

75: for (count = 0; count < n; count++)

76: printf(“%s\n”, p[count]);

77: }

Enter one line at time; enter a blank when done.

dog

apple

zoo

program

merry

LISTING15.7 continued

OUTPUT

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