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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#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
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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