0 like 0 dislike
2.1k views

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: 43460 - Available when: 2018-01-20 09:00 - Due to: Unlimited
| 2.1k views

4 Answers

0 like 0 dislike
Hidden content!
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char input[500],s1[500],s2[500],temp;

int i,space,sum[500],carry,temp2,flag=0;

int main(){
* *** * * * ** **** **** ***** * * * %s",&s1,&s2);
* ** ** ** ** * * * ****** *

///get space
** ** * * ** ** *** * * ** ** * ** * * **
* * *** * *** * * ** * *** * * ** *** * * '){space=i;}
    }

///get s1
* *** * * *** * * *** ** * * *** ';i++){
********* ** *** * **** ** * * * * * **** *** * *
    }

* * ** * ****** * * * ** * * **** **
///reverse input
** * ** * * ** **** ** * * * ** * * *** *
* *** * * * ** * * * * ****** * **** * ** **** ** **
**** * * * ** **** * * ******* ** ** * ** * ** * *** **
** * ** *** * * *** ** **** **** *** ***** ****** * ** * * * * ** **
    }

///get reversed s2
** * ******* *** * ***** ** * ';i++){
* * ** * * * *** *** * ** ** * * * * * * * *
    }

///reverse s1

* * **** * * * * **** ** ***** ***
* * * ** * *** *** ** * ** ** * *** * * ** * * *

** ** * *** *** ** * * * *** * ** ** * **** ** * * ***
* * * * * *** * * *********** **** **** ** * * *** **
    }

///sum s1 and s2
**** * ** * *** ******** * *
* * * ****** * ***** ** **** * *
** ** ** ****** ** * **** *** * ** * * ** * *
******* * ****** * ****** ** ** *** *** ** ** *** * **
** ** **** * * *** ** * * *** * *** * ** ** ** * * * *
*** * * ** * **** *** ** ***** * **** * * ** * *** *** * *
* *** ** * * * ** * * ***** * ** *** **

    }

* * * ** ** ** **** * *** * rev:%s\n",input);
** ** ** *** ** *** rev:%s\n",s1);
** ** *** * ** * * * ** ****** rev:%s\n",s2);
**** * *** ** *** **** * * * * ** * ** ** * *** * **** *** ** ** **

///reverse output
* * * ** * * * ** * *** * ***** *
** **** *** *** * ** * *** * * ** ******* ** ** ** **

** * * * * * * *** * * ***** *** * ** * * ** ** * * ******
* * *** * * ** ** ** ** * ****** * ** ***
    }

///print
* ** ** * ** * **** * ** * **
**** *** ****** ** *** * ** * * ** * ** ** * ** ** ** * * *** *** *
** ** *** *** * * ** * * ** **** *** * ** * * ** * * * **** ** ** **** * *
* * *** ** * * *** * ** * * * * ** ** * ** ** *** * ** ****** ** ** ** * * * *** * * ** * ** * *** * * * * *
* * ** * *** *** ** * *** * * *** * * *** ******* * ** * * * * ** * *** ** **** ** ** * *** *
* *** * * *** ** * * * * ** ** * * * ** * ***** **** ** *

* * ** * *** *** ********** * * * ** * ***** ***

    }
**** * * * * ** * ******* **** *** * ***
    return 0;
}
answered by (-286 points)
edited by
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
0 0
prog.c: In function 'main':
prog.c:80:12: warning: multi-character character constant [-Wmultichar]
     printf('10');
            ^~~~
prog.c:80:12: warning: passing argument 1 of 'printf' makes pointer from integer without a cast [-Wint-conversion]
In file included from prog.c:1:0:
/usr/include/stdio.h:364:12: note: expected 'const char * restrict' but argument is of type 'int'
 extern int printf (const char *__restrict __format, ...);
            ^~~~~~
prog.c:80:5: warning: format not a string literal and no format arguments [-Wformat-security]
     printf('10');
     ^~~~~~
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
0 like 0 dislike
Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{
* * * * * ** * ** * **** string1[50];
* *** * * ** * * * string2[50];

** ****** * * * * * *** ** * ** ** * * string1);
*** * ** * ** ******* * **** * * *** string2);
* *** ** ******* * arr[51]={0},i;

* * * ** * * * ** * ** i<strlen(string1); i++)
* * ** **** *
* * *** ** * * * * * ** ** ** * ** ** *** *** += string1[strlen(string1) - 1 - i] - 48;
    }

* * * * ****** * * ** * * * i<strlen(string2); i++)
* ** * **** *** *** * *
** * ** **** * * ** * *** ** * ** * * * * += string2[strlen(string2) - 1 - i] - 48;
* ** **** * * * ******

* * * * * * ** *** ** *** i<50; i++)
**** ******** ** ** *
* * ** **** ** * * * * ** * ***** ** * * > 9)
** ** **** * **** *** ***** * * ** ** * * *
* ** *** ** *** ****** ** *** * ** * * * * ** ** ** * * * * **** -= 10;
* * * ** *** * *** ** ***** * *** *** ** *** * ** ** *** * * * *
* *** ** * ** * * *** **** ** * * * * * **
* ***** * * **** *

* ** * * * ** *** *** **** i>=0; i--)
*** *** ** * **
******* * * * * ** * * * * * * * * ** != 0)
** * *** * ** ** ** ***** ** * ** *** * *** * * ** * ** ***** * **
* * ** * ****** *

*********** ** ** **** * ** i--)
* ** **** ** *** ** * * *** * * **** * * **** **** * **** ** * arr[i]);
}
answered by (-168 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
int main (){
int s1,s2,l1,l2;
int num1[50],num2[50],sum[50];
printf("enter input 1: ");
** *** * * * * * * **
printf("enter input 2: ");
* ** * * * * * **
for(l1=s1[l1]!='\0')
* * * * ***** * * **
for(l2=s2[l2]!='\0')
* ** * ** * * * ** * **** **
int carry=0;
int k=0;
int i=l1-1;
int j=l2-1;
* * *** ** * * * * ** *
{
** * ** * ** * *** * * ** *
** **** *** **** *
* * * * * * *** ** ***** * *** * ** ** * * *
** ** ***** * *** ******** * *** * * * * * * ** * * * * ****** ** * **** * ** *** * * *
* ** ** *** * * ** *** * ** **** * ** ** * ** * *** * *** * ** * ** * * * **
*** * * ****** * ** ** if (j>=0)
**** * ***** * * * * * ** *** ** * *
* * * ** * * * * * *** *** ** *** *** *** **** * ** ** * ***** * * *
* * * * * * * * * **** * *** **** * * ** * * * **** ** * ** **** * ** ** ** ** * *
** ***** *** ******* * *** ** ** *** if(carr>0)
* * ** *** ** * *** * ****** * ***** * **
*** * ** * * **** ** ** ** * * *** *** ** ** ** **** * * * ");
** **** * ** **** ** ** * * * * ** ** * **
}
for(k--;k>=0;k--)
*** ** ** * ** *** **
* * **** *** * * * *** * **** *** ** *** * * * **
*** * *** *** ***
  return 0;
}
answered by (16 points)
0 0
prog.c: In function 'main':
prog.c:9:10: error: subscripted value is neither array nor pointer nor vector
 for(l1=s1[l1]!='\0')
          ^
prog.c:9:20: error: expected ';' before ')' token
 for(l1=s1[l1]!='\0')
                    ^
prog.c:9:20: error: expected expression before ')' token
prog.c:10:10: error: subscripted value is neither array nor pointer nor vector
   num1=s1[l1]-'0';
          ^
prog.c:11:10: error: subscripted value is neither array nor pointer nor vector
 for(l2=s2[l2]!='\0')
          ^
prog.c:11:20: error: expected ';' before ')' token
 for(l2=s2[l2]!='\0')
                    ^
prog.c:11:20: error: expected expression before ')' token
prog.c:12:12: error: subscripted value is neither array nor pointer nor vector
     num2=s2[l2]-'0';
            ^
prog.c:17:15: error: expected ')' before ';' token
 for(;i>=0;j>=0;i--;j--;k++)
               ^
prog.c:23:13: error: expected ';' before 'carry'
             carry=(num1[i--]+num2[j]+carry)/10;
             ^~~~~
prog.c:27:13: error: expected ';' before 'carry'
             carry=(num1[j--]+num2[j]+carry)/10;
             ^~~~~
prog.c:28:18: error: 'carr' undeclared (first use in this function)
         }else if(carr>0)
                  ^~~~
prog.c:28:18: note: each undeclared identifier is reported only once for each function it appears in
0 like 0 dislike
Hidden content!
#include <stdio.h>
#include <stdlib.h>
#include <string.h>


int main()
{
*** * ** * ** *** ***** * a[50],b[50];
*** *** *** *** * ***** c[51]={0};
** * * ** *** ** ** * * ** * i;
** ** **** * * ** x=0;

* * ** ** * *** * ** *** * ** %s",a,b);

**** * * **** ** * * ** * ** *
    {
* * * ** * ** * **** * * ** ****** *** * * *** *
    }

* * * *** * * * ** ****
* * * * *
* * * * * * ** ** *** ** ** ** ******* * * *
** * * ** ** * ****


*** ** ** ** * * * * * * *** * *
* * * ** *** *****
* * * * ** ** ** * *** **** * **** **** ** ** * *
* ** **** ** ** *** ** * ** ** * * *** **** * ***
*** * * ** *** * *** ** *** *** *** ******* ** * ** *** ** * **** *
** *** * ** **** *** ****** ** ***** * ** ** * ** * ** ****** ***
* * ** * **** * ** * * * * * * *
    }

** * * * * * * * * ** *** ** * * *
** *** ** * * * * * ** *
** * * * * * ** *** *** *** * * * ** != 0)
*********** ****** ** * *** * * * ** ****
** *** * * ** ***** * * ** ** *** **** * *** * * ** * ** * * ****** **
*** ******* * ** ** * ** *** * * ******** * * **** ** ** * *
* ****** * **** * ** * ** ** ******
    }

** ** **** *** * ** ** * * * * **
    {
****** ** ** * * * * * * * *** * ** * ** ** * *** * * * *** * *
    }


* *** ** * ** * ** **** ** 0;
}
answered by (-193 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.214.39
©2016-2025

Related questions

0 like 0 dislike
13 answers
[Exam] asked Jan 19, 2018 in Final Exam
ID: 43463 - Available when: 2018-01-20 09:00 - Due to: Unlimited
| 3.5k views
0 like 0 dislike
6 answers
[Exam] asked Jan 19, 2018 in Final Exam
ID: 43462 - Available when: 2018-01-20 09:00 - Due to: Unlimited
| 1.8k views
0 like 0 dislike
8 answers
[Exam] asked Jan 19, 2018 in Final Exam
ID: 43461 - Available when: 2018-01-20 09:00 - Due to: Unlimited
| 2.1k views
0 like 0 dislike
12 answers
[Exam] asked Jan 19, 2018 in Final Exam
ID: 43459 - Available when: 2018-01-20 09:00 - Due to: Unlimited
| 3.6k views
1 like 0 dislike
37 answers
[Exam] asked Jan 16, 2018 in Final Exam
ID: 42299 - Available when: 2018-01-17 14:00 - Due to: Unlimited
| 10.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users