/* ***NUMBER SYSTEMS CONVERTER*** First enter the number (use digits and english letters) DON'T ENTER NEGATIVE NUMBERS! then enter a number system in which your number is then enter a number system into which you want the number to be converted */ #include #include #include using namespace std; long long decimal(const int from, char* num) { long long int res=0; for(int i=strlen(num)-1; i>=0; i--) { res+=(isalpha(num[i])?(toupper(num[i])-55):(num[i]-48))*pow(from, strlen(num)-i-1); } return res; } char* notations(const int from, const int to, char* num) { char fr[100]; long long int n=decimal(from, num); int p=99; for(;n>=1;p--) { fr[p]=char(n%to>9?(n%to+55):(n%to+48)); n/=to; } char* res = new char[100-p]; for(int i=0; i<100-p; i++) { res[i]=fr[p+i+1]; res[i+1]='\0'; } return res; } int main() { int from, to, mn=2; char* n; cout<<"Enter the number: "; bool e[5]; do { n=new char[100]; cin>>n; for(int i=0;i<5; i++) e[i]=0; if(n[0]=='0') e[n[1]=='x'?1:0]=1; for(int i=0;imn) mn=n[i]-54; } else { if(n[i]-47>mn) mn=n[i]-47; } if(!isalpha(n[i])&&n[i]<'0'&&n[i]>'9') { e[2]=1; break; } } for(int i=0;i<5;i++) { if(e[i]) { cout<<(i<2?"Warning: ":"Error: "); switch(i) { case 0:cout<<"A number shouldn't start with 0\n"; break; case 1:cout<<"A number in more than decimal notation doesn't have to start with 0x\n";break; } } } } while(e[2]); cout<<"Number system to convert from: "; cin>>from; while(from>36||from>from; } cout<<"Number system to convert into: "; cin>>to; while(from>36||from<2) { cout<<"Invalid number system. Enter a number between 2 and 36: "; cin>>to; } cout<<"\nresult: "<

Number systems converter