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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#include<stdio.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
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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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