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  1. //
  2. //  Assignment 2 Task 4 template
  3. //  Copyright © 2019 HKU ENGG1340. All rights reserved.
  4. //
  5.  
  6. #include <stdio.h>
  7.  
  8. const int MAX_INT_LENGTH = 100;
  9.  
  10. ///////// DO NOT MODIFY ANYTHING ABOVE THIS LINE /////////
  11.  
  12. // IMPORTANT:  Do NOT change any of the function headers already provided to you
  13. //             It means that you will need to use the function headers as is
  14.  
  15.  
  16. // You may implement additional functions here
  17. void printArray(char arr[], int size)
  18. {
  19.   int i;
  20.   for (i=0; i < size; i++)
  21.     printf("%c ", arr[i]);
  22.  
  23.   printf("\n");
  24. }
  25.  
  26. void rvereseArray(char arr[], int start, int end)
  27. {
  28.     char temp;
  29.     while (start < end)
  30.     {
  31.         temp = arr[start];
  32.         arr[start] = arr[end];
  33.         arr[end] = temp;
  34.         start++;
  35.         end--;
  36.     }
  37. }
  38.  
  39.  
  40.  
  41.  
  42. //
  43. // AddTwoBigNumbers: to sum up two big numbers represented as digits in a char clear_char_array
  44. //
  45. // input:  char bigN[], char bigM[]:  two large numbers
  46. // output the sum as a big number in the input array char sum[]
  47. void AddTwoBigNumbers(char bigN[], char bigM[], char sum[])
  48. {
  49.   rvereseArray(bigN,0,100);
  50.   rvereseArray(bigM,0,100);
  51.  
  52.   //calculation
  53.   int carry =0;
  54.   for(int i=100;i>=0;i--)
  55.   {
  56.     int sum_two = ((bigN[i]-'0') + (bigM[i]-'0') + carry);
  57.     sum[i]=(sum_two%10 + '0');
  58.     carry = sum_two/10;
  59.   }
  60.   rvereseArray(sum,0,100);
  61. }
  62.  
  63.  
  64. ///////// DO NOT MODIFY ANYTHING BELOW THIS LINE /////////
  65.  
  66. // Function: main function
  67. // ==============================================================
  68. int main()
  69. {
  70.   char bignum[2][MAX_INT_LENGTH]; // bignum[0] and bignum[1] are to store the digits of the two input number
  71.   char sum[MAX_INT_LENGTH+1];     // to store the sum of the two big numbers
  72.  
  73.   // read in two numbers
  74.   scanf("%s", bignum[0]);
  75.   scanf("%s", bignum[1]);
  76.   // calculate sum of the two numbers
  77.   AddTwoBigNumbers(bignum[0], bignum[1], sum);
  78.  
  79.   // display the sum on screen
  80.   printf("%s\n", sum);
  81.  
  82.  
  83.   return 0;
  84. }
  85.  
Success #stdin #stdout 0s 9424KB
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stdout
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+,-//***-/+--)'.*-,/))))*-+-*-.*('/+,2..*7-+()*..*),09-.1/.--)/*,0*-'90(/5'/-)/*))))****,1'*+10(,*)+++
https://ideone.com/Qa0aAu
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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