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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| //* book.c -- one-book inventory */ | ||
| #include <stdio.h> | ||
| #include <string.h> | ||
| char * s_gets(char * st, int n); | ||
| #define MAXTITL 41 /* maximum length of title + 1 */ | ||
| #define MAXAUTL 31 /* maximum length of author's name + 1 */ | ||
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| struct book { /* structure template: tag is book */ | ||
| char title[MAXTITL]; | ||
| char author[MAXAUTL]; | ||
| float value; | ||
| }; /* end of structure template */ | ||
|
|
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| int main(void) | ||
| { | ||
| struct book library; /* declare library as a book variable */ | ||
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| printf("Please enter the book title.\n"); | ||
| s_gets(library.title, MAXTITL); /* access to the title portion */ | ||
| printf("Now enter the author.\n"); | ||
| s_gets(library.author, MAXAUTL); | ||
| printf("Now enter the value.\n"); | ||
| scanf("%f", &library.value); | ||
| printf("%s by %s: $%.2f\n",library.title, | ||
| library.author, library.value); | ||
| printf("%s: \"%s\" ($%.2f)\n", library.author, | ||
| library.title, library.value); | ||
| printf("Done.\n"); | ||
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| return 0; | ||
| } | ||
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| char * s_gets(char * st, int n) | ||
| { | ||
| char * ret_val; | ||
| char * find; | ||
|
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| ret_val = fgets(st, n, stdin); | ||
| if (ret_val) | ||
| { | ||
| find = strchr(st, '\n'); // look for newline | ||
| if (find) // if the address is not NULL, | ||
| *find = '\0'; // place a null character there | ||
| else | ||
| while (getchar() != '\n') | ||
| continue; // dispose of rest of line | ||
| } | ||
| return ret_val; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| /* manybook.c -- multiple book inventory */ | ||
| #include <stdio.h> | ||
| #include <string.h> | ||
| char * s_gets(char * st, int n); | ||
| #define MAXTITL 40 | ||
| #define MAXAUTL 40 | ||
| #define MAXBKS 100 /* maximum number of books */ | ||
|
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| struct book { /* set up book template */ | ||
| char title[MAXTITL]; | ||
| char author[MAXAUTL]; | ||
| float value; | ||
| }; | ||
|
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||
| int main(void) | ||
| { | ||
| struct book library[MAXBKS]; /* array of book structures */ | ||
| int count = 0; | ||
| int index; | ||
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| printf("Please enter the book title.\n"); | ||
| printf("Press [enter] at the start of a line to stop.\n"); | ||
| while (count < MAXBKS && s_gets(library[count].title, MAXTITL) != NULL | ||
| && library[count].title[0] != '\0') | ||
| { | ||
| printf("Now enter the author.\n"); | ||
| s_gets(library[count].author, MAXAUTL); | ||
| printf("Now enter the value.\n"); | ||
| scanf("%f", &library[count++].value); | ||
| while (getchar() != '\n') | ||
| continue; /* clear input line */ | ||
| if (count < MAXBKS) | ||
| printf("Enter the next title.\n"); | ||
| } | ||
|
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||
| if (count > 0) | ||
| { | ||
| printf("Here is the list of your books:\n"); | ||
| for (index = 0; index < count; index++) | ||
| printf("%s by %s: $%.2f\n", library[index].title, | ||
| library[index].author, library[index].value); | ||
| } | ||
| else | ||
| printf("No books? Too bad.\n"); | ||
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| return 0; | ||
| } | ||
|
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| char * s_gets(char * st, int n) | ||
| { | ||
| char * ret_val; | ||
| char * find; | ||
|
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||
| ret_val = fgets(st, n, stdin); | ||
| if (ret_val) | ||
| { | ||
| find = strchr(st, '\n'); // look for newline | ||
| if (find) // if the address is not NULL, | ||
| *find = '\0'; // place a null character there | ||
| else | ||
| while (getchar() != '\n') | ||
| continue; // dispose of rest of line | ||
| } | ||
| return ret_val; | ||
| } |