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  1. #include<stdio.h>
  2. #include<string.h>
  3. int num1[10],num2[10],ANS[10];
  4. void dectohex(int a)
  5. {
  6.  switch(a)
  7.  {
  8.   case 10:printf("A");
  9. 	  break;
  10.   case 11:printf("B");
  11. 	  break;
  12.   case 12:printf("C");
  13. 	  break;
  14.   case 13:printf("D");
  15. 	  break;
  16.   case 14:printf("E");
  17. 	  break;
  18.   case 15:printf("F");
  19. 	  break;
  20.  }
  21. }
  22. void Add()
  23. {
  24.  int i,j,carry,ans,flag;
  25.  int len1,len2;
  26.  char str1[10],str2[10];
  27.  printf("Enter first number");
  28.  scanf("%s",&str1);
  29.  printf("Enter second number");
  30.  scanf("%s",&str2);
  31.  len1=strlen(str1);
  32.  len2=strlen(str2);
  33.  for(i=len1-1,j=9;i>=0;i--,j--)
  34.  {
  35.   if(str1[i]>='0'&&str1[i]<='9')
  36.   {
  37.    num1[j]=str1[i]-'0';
  38.   }
  39.   else if(str1[i]>='A'&&str1[i]<='F')
  40.   {
  41.    num1[j]=str1[i]-55;
  42.   }
  43.  }
  44.   for(i=len2-1,j=9;i>=0;i--,j--)
  45.  {
  46.   if(str2[i]>='0'&&str2[i]<='9')
  47.   {
  48.    num2[j]=str2[i]-'0';
  49.   }
  50.   else if(str2[i]>='A'&&str2[i]<='F')
  51.   {
  52.    num2[j]=str2[i]-55;
  53.   }
  54.  }
  55.  carry=0;
  56.  for(i=9;i>=0;i--)
  57.  {
  58.   ans=num1[i]+num1[i]+carry;
  59.   if(ans>=16)
  60.   {
  61.    carry=ans/16;
  62.   }
  63.   else
  64.   {
  65.    carry=0;
  66.   }
  67.   ANS[i]=ans%16;
  68.  }
  69.  flag=0;
  70.  printf("Result=");
  71.  for(i=0;i<10;i++)
  72.  {
  73.   if(flag==0&&ANS[i]>0)
  74.   {
  75.    if(ANS[i]>9)
  76.    {
  77.     dectohex(ANS[i]);
  78.    }
  79.    else
  80.    {
  81.     printf("%d",ANS[i]);
  82.     flag=1;
  83.    }
  84.   }
  85.   else if(flag==1)
  86.   {
  87.   if(ANS[i]>9)
  88.    {
  89.     dectohex(ANS[i]);
  90.    }
  91.    else
  92.    {
  93.     printf("%d",ANS[i]);
  94.    }
  95.   }
  96.  }
  97. }
  98. void Multiply()
  99. {
  100.  int i,j,carry,ans,flag, k;
  101.  int len1,len2;
  102.  char str1[10],str2[10];
  103.  printf("Enter first number");
  104.  scanf("%s",&str1);
  105.  printf("Enter second number");
  106.  scanf("%s",&str2);
  107.  len1=strlen(str1);
  108.  len2=strlen(str2);
  109.  for(i=len1-1,j=9;i>=0;i--,j--)
  110.  {
  111.   if(str1[i]>='0'&&str1[i]<='9')
  112.   {
  113.    num1[j]=str1[i]-'0';
  114.   }
  115.   else if(str1[i]>='A'&&str1[i]<='F')
  116.   {
  117.    num1[j]=str1[i]-55;
  118.   }
  119.  }
  120.   for(i=len2-1,j=9;i>=0;i--,j--)
  121.  {
  122.   if(str2[i]>='0'&&str2[i]<='9')
  123.   {
  124.    num2[j]=str2[i]-'0';
  125.   }
  126.   else if(str2[i]>='A'&&str2[i]<='F')
  127.   {
  128.    num2[j]=str2[i]-55;
  129.   }
  130.  }
  131.  carry=0;
  132. for(i=9;i>=0;i--)
  133.  {
  134.  for(j=9;j>=0;j--)
  135.  {
  136.   ans=num1[j]*num2[i]+carry;
  137.   if(ans>=16)
  138.   {
  139.    carry=ans/16;
  140.   }
  141.   else
  142.   {
  143.    carry=0;
  144.   }
  145.    k=i;
  146.   ANS[k]+=ans%16;
  147.    k--;
  148.  }
  149. } 
  150.  flag=0;
  151.  printf("Result=");
  152.  for(i=0;i<10;i++)
  153.  {
  154.   if(flag==0&&ANS[i]>0)
  155.   {
  156.    if(ANS[i]>9)
  157.    {
  158.     dectohex(ANS[i]);
  159.    }
  160.    else
  161.    {
  162.     printf("%d",ANS[i]);
  163.     flag=1;
  164.    }
  165.   }
  166.   else if(flag==1)
  167.   {
  168.   if(ANS[i]>9)
  169.    {
  170.     dectohex(ANS[i]);
  171.    }
  172.    else
  173.    {
  174.     printf("%d",ANS[i]);
  175.    }
  176.   }
  177.  }
  178. }
  179. void main()
  180. {
  181.  int opt;
  182.  clrscr();
  183.  printf("HEXADECIMAL ARITHMETIC\n1.Addition\n2.Multiplication\n3.Exit");
  184.  printf("\nEnter your option:");
  185.  scanf("%d",&opt);
  186.  switch(opt)
  187.  {
  188.   case 1:
  189. 	 Add();
  190. 	 break;
  191.   case 2:Multiply();
  192. 	break;
  193.   case 3:return;
  194.  }
  195.  getch();
  196. }
  197.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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2
AB 
AB
compilation info 
prog.c:28:13: warning: format specifies type 'char *' but the argument has type 'char (*)[10]' [-Wformat]
 scanf("%s",&str1);
        ~~  ^~~~~
prog.c:30:13: warning: format specifies type 'char *' but the argument has type 'char (*)[10]' [-Wformat]
 scanf("%s",&str2);
        ~~  ^~~~~
prog.c:104:13: warning: format specifies type 'char *' but the argument has type 'char (*)[10]' [-Wformat]
 scanf("%s",&str1);
        ~~  ^~~~~
prog.c:106:13: warning: format specifies type 'char *' but the argument has type 'char (*)[10]' [-Wformat]
 scanf("%s",&str2);
        ~~  ^~~~~
prog.c:179:1: error: 'main' must return 'int'
void main()
^~~~
int
prog.c:182:2: warning: implicit declaration of function 'clrscr' is invalid in C99 [-Wimplicit-function-declaration]
 clrscr();
 ^
prog.c:195:2: warning: implicit declaration of function 'getch' is invalid in C99 [-Wimplicit-function-declaration]
 getch();
 ^
6 warnings and 1 error generated.
stdout
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Standard output is empty
https://ideone.com/eLzysF
language:
C (clang 8.0)
created:
7 years ago
visibility:
public

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