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  1. #include <cstdio>
  2. #include <iostream>
  3. #include <cstdlib>
  4. #include <algorithm>
  5. #include <cstring>
  6. #include <vector>
  7. #include <stack>
  8. #include <queue>
  9. #include <cstdlib>
  10. #include <iostream>
  11. #include <cstring>
  12. #include <string>
  13. #include <cmath>
  14. #include <sstream>
  15.  
  16. using namespace std;
  17.  
  18. string hex_to_binary(string number)
  19. {
  20.     string binary1="";
  21.     for(int i=0;i<number.length();++i)
  22.     {
  23.         switch (number[i])
  24.                 {
  25.                     case '0':
  26. 							binary1 += "0000";break;
  27.                     case '1':
  28.                         binary1 += "0001";break;
  29.                     case '2':
  30.                         binary1 += "0010";break;
  31.                     case '3':
  32.                         binary1 += "0011";break;
  33.                     case '4':
  34.                         binary1 += "0100";break;
  35.                     case '5':
  36.                         binary1 += "0101";break;
  37.                     case '6':
  38.                         binary1 += "0110";break;
  39.                     case '7':
  40.                         binary1 += "0111";break;
  41.                     case '8':
  42.                         binary1 += "1000";break;
  43.                     case '9':
  44.                         binary1 += "1001";break;
  45.                     case 'A':
  46.                         binary1 += "1010";break;
  47.                     case 'B':
  48.                         binary1 += "1011";break;
  49.                     case 'C':
  50.                         binary1 += "1100";break;
  51.                     case 'D':
  52.                         binary1 += "1101";break;
  53.                     case 'E':
  54.                         binary1 += "1110";break;
  55.                     case 'F':
  56.                         binary1 += "1111";break;
  57.             }
  58.  
  59.  
  60.     }
  61.     return binary1;
  62. }
  63.  
  64. int main()
  65. {
  66.     int tst_cases;
  67.     cin>>tst_cases;
  68.     while(tst_cases--)
  69.     {
  70.      string op;
  71.     string number1,number2;
  72.     cin>>number1>>op>>number2;
  73.  
  74. 	int num1 = stoi(number1, 0, 16);
  75. 	int num2 = stoi(number2, 0, 16);
  76.  
  77.     int result;
  78.     if(op=="+")
  79.        result=num1+num2;
  80.     else
  81.        result=num1-num2;
  82.  
  83.  
  84.     string s1=hex_to_binary(number1);
  85.     string s2=hex_to_binary(number2);
  86.  
  87.     while(s1.length()<13)
  88.         s1="0"+s1;
  89.     while(s2.length()<13)
  90.         s2="0"+s2;
  91.  
  92.         printf("%s %c %s = %d\n",s1.c_str(),op[0],s2.c_str(),result);
  93.     }
  94.  
  95. return 0;
  96. }
  97.  
Runtime error #stdin #stdout #stderr 0s 3432KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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terminate called after throwing an instance of 'std::invalid_argument'
  what():  stoi
https://ideone.com/uSIEZu
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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