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  1. #include <stdio.h>
  2. #include <math.h>
  3. #include <string.h>
  4.  
  5. void tostring(char str[], int num)
  6. {
  7.     int i, rem, len = 0, n;
  8.  
  9.     n = num;
  10.     while (n != 0)
  11.     {
  12.         len++;
  13.         n /= 10;
  14.     }
  15.     for (i = 0; i < len; i++)
  16.     {
  17.         rem = num % 10;
  18.         num = num / 10;
  19.         str[len - (i + 1)] = rem + '0';
  20.     }
  21.     str[len] = '\0';
  22. }
  23.  
  24. int toint(char str[])
  25. {
  26.     int len = strlen(str);
  27.     int i, num = 0;
  28.  
  29.     for (i = 0; i < len; i++)
  30.     {
  31.         num = num + ((str[len - (i + 1)] - '0') * pow(10, i));
  32.     }
  33.  
  34.    return num;
  35. }
  36.  
  37. main()
  38. {
  39.     char a1[]="1234";
  40.     char a2[]="56";
  41.     char a3[5];
  42.  
  43.     int b1, b2, b3;
  44.  
  45.     b1 = toint(a1);
  46.     b2 = toint(a2);
  47.  
  48.     b3=b1+b2;
  49.  
  50.     tostring(a3,b3);
  51.  
  52.     printf("%s\n", a3);
  53. }
Success #stdin #stdout 0s 10304KB
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https://ideone.com/Y5xQxt
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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