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!
#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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    char a[51],b[51];
    scanf("%s %s",a,b);
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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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