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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Hidden content!
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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: 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];
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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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