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

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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
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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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