Final Exam 3 (20%)

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You are requested to help in writing a program to perform addition of two large number up to 50-digits. In C there is no builtin datatype for large number, but we can use characters and array to solve the problem.

Input: The input will contain two positive integers are separated by a blank, the two positive integers do not exceed 50-digits.

Output: Sum.

寫一個程式輸入兩個大數(最大50個位數)，計算其總合。C語言不提供大數資料型態，但我們可以用字元和陣列來解決這個問題。

Example input:

999999999999999999999999999999 999999999999999999999999999999

Example output:

1999999999999999999999999999998

 

[Exam] asked in Final Exam
ID: 42300 - Available when: 2018-01-17 14:00 - Due to: Unlimited
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32 Answers

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Hidden content!
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Hidden content!
#include <stdio.h>
#include <string.h>
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#include<stdio.h>
#include<string.h>

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answered by (323 points)
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prog.c: In function 'main':
prog.c:14:1: error: expected declaration or statement at end of input
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prog.c:14:1: error: expected declaration or statement at end of input
commented by (4.3k points)
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prog.c: In function 'main':
prog.c:14:1: error: expected declaration or statement at end of input
 {
 ^
prog.c:14:1: error: expected declaration or statement at end of input
commented by (4.3k points)
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prog.c:8:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'int'
 int main()
 ^~~
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prog.c: In function 'main':
prog.c:7:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
 char s1[50]. s2[50];
            ^
prog.c:7:12: error: expected expression before '.' token
prog.c:10:13: error: 's1' undeclared (first use in this function)
 scanf("%s", s1);
             ^~
prog.c:10:13: note: each undeclared identifier is reported only once for each function it appears in
prog.c:11:13: error: 's2' undeclared (first use in this function)
 scanf("%s", s2);
             ^~
prog.c:12:18: error: expected ';' before '!' token
 for (l1=0;s1[l1] ! = '\0';l1++){
                  ^
prog.c:15:22: error: expected ';' before '!' token
     for (l2=0;s2[l2] ! = '\0';l2++){
                      ^
prog.c:28:1: error: expected declaration or statement at end of input
 }
 ^
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Hidden content!
#include<stdio.h>
#include<string.h>
int main(void)
{
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}
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Hidden content!
#include<stdio.h>
#include<string.h>

int main(){
    char a[50],b[50],sum[51];
* *   *     *      *  *  ***  * i=0;i<51;i++) sum[i]=-1;
** ** * *  ** * ***  *** ** * ***   *     %s",a,b);


    int n=strlen(a),m=strlen(b);
    int stop=n>m?n:m;

    int carry=0;
 **  ****  * * ** ** ** * * i=1;i<=stop;i++){
*    **  **** *    ***  **  * ** **   *    * ****  * *  ** **    * ****     **   ****  q,w;
     * **** *** *  * * *   ***** *** * *** * ****  *     *** ****  ****** * ** *   *  ** *** * *
 *  *** **    * *  ***  *   * ** ** *** *** *****  * * * ******** *** *  * *    *** *     ****  *   ***    * ****  *   ***  ** * * 
 ** *  * * **   *    *  * **   *   ****  * ******  * **** * * *       ** ***      * ****  ***  if(m<i)
** *  *  **    ****** **** * *** ** * *  * * * ****   * *   *  * ***  * **  ** * **   **   *  ** * *** *  ** **    *  **   *   **  *
   *  *  ** * *  ***  * *   * ** ** **    ****   ** ** * **  **  * * *******    ***     * 
* **  * *   *  **  * * **  ***  *   *** *   * ** *   * * *     * ** **   * *  * ***    *  * ***** *** ****  *  ** **** * 

*      **  **** *   * **** **   ****** *** *     *  *  ** * *   *   * * ** *  ******* * * * * * 
* * * *  ** *  ****  *** * *** **     * * ***** *** *   ** *    * *   * *  * * * *** *   ** ***   *** **   
*  * * * * **** ****    * *   * * *  ****  *** ***** *   * *  * * *  * *   *    * **** **  *  **  *  ***  * * * *     
* ** **  ***** * * *   *        *********** * *  * *   *  * ***   *** *****  *** * ** * **** ** *** **  *  * **      * sum[stop-i]=1;
** * ***   * * ** **     *   * **** * **  *  *  *  *  ** *  * * *** *    *****  ** * *   ** *******   ****** sum[stop-i]=0;
     ** * * *****  * *****  * *******  *  ** * * ** * *** *** *  *** * ****  ****
** *****  ** ***  ****** *  **      ***     * **   * **     *         *****  *** *****
  **           *   *** * * *  ****  * * * ******* ** *   *** * * * ** **  ** * *** ***  ******  **** *   ** ** **
**   ***** *  ** ********  ** * *** **** * *  * * *   *****   * * * ***   ** * * ***   * 
    }

***   **** **  ** * ** * *****  i=0;i<51;i++){
****   * *  ** * ** * * * * *    *** ***  ****  * *****    *  printf("%c",sum[i]+'0');
    }


*     ****  ** *   **      ***  0;
}
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