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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#include<string.h>


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Hidden content!
#include <stdio.h>
#include <string.h>
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Hidden content!
#include <stdio.h>
#include <string.h>
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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)
{
    int i,j,aa,bb,cnt=0,sum[51]={0};
    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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