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!
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Hidden content!
#include <stdio.h>
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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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