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

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
 {
 ^
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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