A+B Coming

 1 #include <stdio.h>
 2 #include <string.h>
 3 #include <ctype.h>
 4 #include <math.h>
 5 
 6 int decimal(char s[]);
 7 
 8 int main(){
 9     char s1[50];
10     char s2[50];
11     int number1;
12     int number2;
13     
14     while(scanf("%s%s",s1,s2)!=EOF){
15         number1=decimal(s1);
16         number2=decimal(s2);
17         
18         printf("%d\n",number1+number2);
19         
20     }
21     
22     return 0;
23 }
24 
25 int decimal(char s[]){
26     int result=0;
27     int i;
28     int length;
29     int temp;
30     
31     length=strlen(s);
32     
33     for(i=length-1;i>=0;i--){
34         if(isdigit(s[i]))
35             temp=s[i]-‘0‘;
36             
37         else if(s[i]==‘A‘ || s[i]==‘a‘)
38             temp=10;
39             
40         else if(s[i]==‘B‘ || s[i]==‘b‘)
41             temp=11;
42             
43         else if(s[i]==‘C‘ || s[i]==‘c‘)
44             temp=12;
45             
46         else if(s[i]==‘D‘ || s[i]==‘d‘)
47             temp=13;
48             
49         else if(s[i]==‘E‘ || s[i]==‘e‘)
50             temp=14;
51             
52         else if(s[i]==‘F‘ || s[i]==‘f‘)
53             temp=15;
54             
55         result+=temp*pow(16,length-1-i);
56     }
57     
58     return result;
59 }