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>
#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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**      *** ****  *   * *** * **  *    * ** *   *  *  **  ** **** *  *    *   **   * * *    **  * ******* ** *  * * * 

    }

    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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