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  1. #include <stdio.h>
  2.  
  3. void inputChar(char *str)
  4. {
  5.     printf("input array char <100: ");
  6.     scanf("%s", str);
  7. }
  8. void revers(char *A)
  9. {
  10.     int j;
  11.     for (j = 0; A[j] != '\0'; j++);
  12.     j--;
  13.     for (int i = 0; i <j; i++, j--)
  14.     {
  15.         char temp = A[i];
  16.         A[i] = A[j];
  17.         A[j] = temp;
  18.     }
  19. }
  20. int charToDecInt(char *A)
  21. {
  22.     int summ = 0;
  23.     for (int i = 0; A[i] != '\0'; i++)
  24.     {        
  25.         if ('0' <= A[i] && A[i] <= '9')
  26.         {
  27.             summ *= 10;
  28.             summ += A[i] - '0';
  29.         }
  30.         else
  31.         {
  32.             summ += A[i]-'A'+10;
  33.         }
  34.  
  35.     }
  36.     return summ;
  37. }
  38. void decIntTohexString(int a, char *A)
  39. {
  40.     int j = 0;
  41.     while (a != 0)
  42.     {
  43.         int r = a % 16;
  44.         if (r >= 1 && r <= 9)
  45.         {
  46.             r += '0';
  47.         }
  48.         else 
  49.         {
  50.             r += 'A'- 10;
  51.         }
  52.         A[j++] = r+A[j];
  53.         a /= 16;
  54.     }
  55.     A[j] = '\0';
  56.     revers(A);
  57. }
  58. void display()
  59. {
  60.     const int N = 100;
  61.     char A[100] = {};
  62.     char B[100] = {};
  63.     inputChar(A);
  64.     int a = charToDecInt(A);
  65.     decIntTohexString(a, B);
  66.     printf("hexChar = %s\n", B);
  67. }
  68. int main()
  69. {
  70.     display();
  71.     return 0;
  72. }
Success #stdin #stdout 0s 9432KB
comments (?)
stdin
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444444asdf
stdout
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input array char <100: hexChar = 6C8DE
https://ideone.com/6GSmhI
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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