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The 13-digit International Standard Book Number (ISBN) is a unique code that identifies a book commercially. The last digit is a check digit used for error detection. To calculate its value, each digit of the first twelve digits is alternately multiplied, from left to right, by 1 or 3. The products are summed up and divided by 10. The check digit is the remainder of the division subtracted from 10. If it is 10, it becomes 0.

ISBN檢查號的計算方法: 前12個數字，奇數項 乘以 1 ， 偶數項乘以 3

For example, assume that the first twelve digits are 978960931961.

(a) (9*1 + 7*3 + 8*1 + 9*3 + 6*1 + 0*3 + 9*1 + 3*3 + 1*1 + 9*3 + 6*1 + 1*3) = 126

(b) The check digit = 10 – (126 % 10) = 10 – 6 = 4

So the valid ISBN is: 9789609319614

Write a program that reads a 13-digit ISBN and checks the last digit to see if it is valid or not.

#Try 1:

Input:

``9789609319614``

Output:

``Valid ISBN``

#Try 2:

Input:

``9781482214505``

Output:

``Valid ISBN``

#Try 3:

Input:

``9780132936493``

Output:

``Invalid ISBN``

[Exam] asked in Midterm | 2.2k views

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answered by (323 points)
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Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Case 3: Correct output
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prog.c: In function 'main':
prog.c:8:11: warning: too many arguments for format [-Wformat-extra-args]
scanf("%1d1d1d1d1d1d1d1d1d1d1d1d1d", &n1,&n2,&n3,&n4,&n5, &n6, &n7, &n8, &n9, &n10, &n11,&n12, &n13);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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prog.c:2:1: warning: return type defaults to 'int' [-Wimplicit-int]
main()
^~~~
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0 0
prog.c: In function 'main':
prog.c:12:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'long long int *' [-Wformat=]
scanf("%d", &n);
^
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0 0
prog.c: In function 'main':
prog.c:5:10: warning: too many arguments for format [-Wformat-extra-args]
scanf("number",&a);
^~~~~~~~
prog.c:6:11: warning: too many arguments for format [-Wformat-extra-args]
printf("Valid ISBM",a);
^~~~~~~~~~~~
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prog.c: In function 'main':
prog.c:5:14: warning: format '%ld' expects argument of type 'long int *', but argument 2 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:17: warning: format '%ld' expects argument of type 'long int *', but argument 3 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:20: warning: format '%ld' expects argument of type 'long int *', but argument 4 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:23: warning: format '%ld' expects argument of type 'long int *', but argument 5 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:26: warning: format '%ld' expects argument of type 'long int *', but argument 6 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:29: warning: format '%ld' expects argument of type 'long int *', but argument 7 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:32: warning: format '%ld' expects argument of type 'long int *', but argument 8 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:35: warning: format '%ld' expects argument of type 'long int *', but argument 9 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:38: warning: format '%ld' expects argument of type 'long int *', but argument 10 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:41: warning: format '%ld' expects argument of type 'long int *', but argument 11 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:44: warning: format '%ld' expects argument of type 'long int *', but argument 12 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:47: warning: format '%ld' expects argument of type 'long int *', but argument 13 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
prog.c:5:50: warning: format '%ld' expects argument of type 'long int *', but argument 14 has type 'int *' [-Wformat=]
scanf("%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld%ld", &a1,&a2,&a3,&a4,&a5,&a6,&a7,&a8,&a9,&a10,&a11,&a12,&a13);
^
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`Hidden content!#include <stdio.h>#include <stdlib.h>int main(){***  ****** *********  * **** isbn;*** *** ** * * ****   ** * * *** s1;   **   * * **** ***  **   * ** s2; *       *   * *  *** **   *****  *   s3; *   * ** *** *  *  *     ***  s4;*      *** ** *** **     *   s5;  * * *      **   *     **   * s6;* **  *  **** **   ** *  ** s7; ***  *     * *    **   *  s8;* *  ** **   *   * ******* * s9;* *    *  *****  **** ****   s10;* ** *** **** *      * **** s11;  **    ***     *** **   *      s12;**  * ** **** *   *     **  ***** s13;    int check;*** *  * ** *  *  ** sum;  **   **** *      **    * * * *   **    ****      ***  * ** ***         ** *  ****  *  * **  **     ****   *  *** ****   *    *** *** *   * *** * ***     * *****   **    ******   **** *  *         * *** ** ** ** ****  * *  *     ***  **    * *  **          ** ***  *  **   ** *****    ********* * *   *  *  *  * * * * * *  **   ***      *  *** **   * *    ** *  *      * **   **  ***     * ** ** ****** ***   ***   ***  **     *** **   * *  *  *  ******    ***  ***      ** **   * *   *   *    *  **   ** ** **    **     *  * *  *  * *** *  **  ** * **** ** *** **** * ***** *   ** *  *** * *****  ** * *   * *  **  *** *  * **** **  * **   ** **  * *    ***** * * ****** *    ** *** *******  **  ***    * *** * * *  * *   ****  ***  ** ** **    * ** ****   **      *    *** =(10-(sum%10));*     *****   *   ****   * * == s13)    { *  ***  ** ******** ***  * ** * **   **  **** * *    *   *** **  *   ISBN");    } *   ****   *   **   *** *****      {        ***   *   **** *  ** *  *    ** ****** * **** * *  *  **  ISBN");    }  * *** ******* * *** ****  ** * * *    ** **   * * * *  0;    }`
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answered by (-193 points)
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prog.c:2:19: fatal error: conio.h: No such file or directory
#include <conio.h>
^
compilation terminated.
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`Hidden content!#include<stdio.h>int main(void){    int n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,n13,sum,check;  *** ****    ** *******    **   **  **   **   * ****  * * **    ** * * ** *    *   **** *   * * *** * *    **  *** **   ** *** **      **** ** *****  *   ** * * * ***  **   *   *    *  * **  ** * * ***     *  *   * *  **** *  ***    *    ** **    ** *       * **        *** ** *  *******   *  * * **** *** **** **      {******** * *  * * ****   *  *   **    * *  *  *   **** *   ** ***    }*******  **        *  * ***   * *  * ** ** **   **  **** * **  ** * *   *   ** ***  ** **** ***    ** * *** ***   ***   ** *        * *  ** * ** ** * * *  *  * ***  * **** *  ****     *   * *  **    **  *  ISBN");  ****** * *** *  ***  ** *****    *** *** *  *  **   * *    * ***     * ** *  *    * *** ** ** ***      **   *  ** *         ***** *   * *****   *** *** *******   ****** *    * * ********  *  * *     ** * *  **     *****  **  ****  * ****  ** * **  ********    ISBN");    *  * ***  ****  * *   ******  *** *  * ****  *  *  return 0;}`
answered by (-249 points)
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Case 0: Wrong output
Case 1: Wrong output
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Case 3: Correct output