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:172.70.194.139
©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