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java_vs_cpp.cpp
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83 lines (76 loc) · 1.14 KB
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#include<bits/stdc++.h>
using namespace std;
bool isjava(string str)
{
int len = str.length();
for(int i=0;i<len;i++)
{
if(str[i]=='_')
return false;
}
return true;
}
bool iscpp(string str)
{
int len = str.length();
if(str[len-1]=='_')
return false;
//cout<<str[len-1];
for(int i=0;i<len;i++)
{
if(str[i]<='Z')
return false;
}
for(int i=0;i<len-2;i++)
{
if(str[i]=='_' && str[i+1]=='_')
return false;
}
return true;
}
string translate_cpp(string str)
{
for(int i=0;i<str.length();i++)
{
if(str[i]<'a')
{
str[i] = str[i]+32;
str.insert(i,"_");
}
}
return str;
}
string translate_java(string str)
{
for(int i=0;i<str.length();i++)
{
if(str[i]=='_')
{
str.erase(i,1);
str[i] = str[i]-32;
}
}
return str;
}
int main()
{
string str;
while(cin>>str)
{
//int len = str.length();
if(str[0]=='_' || str[0]<='Z')
cout<<"Error!\n";
else if(isjava(str))
{
cout<< translate_cpp(str)<<"\n";
}
else if(iscpp(str))
{
cout<< translate_java(str)<<"\n";
}
else
{
cout<<"Error!\n";
}
}
}