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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32 Answers

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#include <stdio.h>
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#include<string.h>


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Hidden content!
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Hidden content!
#include <stdio.h>
#include <string.h>
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#include<stdio.h>
#include<string.h>

char a[50],b[50],sum[50],bb[50];
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answered by (323 points)
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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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