0 like 0 dislike
3.1k 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
| 3.1k 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:104.23.197.94
©2016-2026

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
| 4.8k 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
| 2.7k 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
| 3.1k 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
| 5k 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
| 16k views
12,783 questions
183,442 answers
172,219 comments
4,824 users