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!
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Hidden content!
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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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    }

    return 0;
}
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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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