未赋值的变量为零，可以在声名的时候初始化为零
by lyyddj @ 2024-08-21 16:39:19
```cpp
#include<iostream>
#include<string>
using namespace std;
int main()
{
string s;
getline(cin,s);
int i;
int a,b,c;
for(i=0;i<s.size();i++)
{
if(s[i]=='a'&&s[i+1]==':'&&s[i+2]=='='&&s[i+4]==';')
{
if(s[i+3]<='9'&&s[i+3]>='0')
{
a=(int)(s[i+3]-'0');
}
if((s[i+3])=='b')
{
a=b;
}
if((s[i+3])=='c')
{
a=c;
}
}
if(s[i]=='b'&&s[i+1]==':'&&s[i+2]=='='&&s[i+4]==';')
{
if(s[i+3]<='9'&&s[i+3]>='0')
{
b=(int)(s[i+3]-'0');
}
if((s[i+3])=='a')
{
b=a;
}
if((s[i+3])=='c')
{
b=c;
}
}
if(s[i]=='c'&&s[i+1]==':'&&s[i+2]=='='&&s[i+4]==';')
{
if(s[i+3]<='9'&&s[i+3]>='0')
{
c=(int)(s[i+3]-'0');
}
if((s[i+3])=='a')
{
c=a;
}
if((s[i+3])=='b')
{
c=b;
}
}
}
cout<<a<<" "<<b<<" "<<c;
}
```
by lyyddj @ 2024-08-21 16:41:11
发错了
by lyyddj @ 2024-08-21 16:41:47
```cpp
#include<iostream>
#include<string>
using namespace std;
int main()
{
string s;
getline(cin,s);
int i;
int a=0,b=0,c=0;
for(i=0;i<s.size();i++)
{
if(s[i]=='a'&&s[i+1]==':'&&s[i+2]=='='&&s[i+4]==';')
{
if(s[i+3]<='9'&&s[i+3]>='0')
{
a=(int)(s[i+3]-'0');
}
if((s[i+3])=='b')
{
a=b;
}
if((s[i+3])=='c')
{
a=c;
}
}
if(s[i]=='b'&&s[i+1]==':'&&s[i+2]=='='&&s[i+4]==';')
{
if(s[i+3]<='9'&&s[i+3]>='0')
{
b=(int)(s[i+3]-'0');
}
if((s[i+3])=='a')
{
b=a;
}
if((s[i+3])=='c')
{
b=c;
}
}
if(s[i]=='c'&&s[i+1]==':'&&s[i+2]=='='&&s[i+4]==';')
{
if(s[i+3]<='9'&&s[i+3]>='0')
{
c=(int)(s[i+3]-'0');
}
if((s[i+3])=='a')
{
c=a;
}
if((s[i+3])=='b')
{
c=b;
}
}
}
cout<<a<<" "<<b<<" "<<c;
}
```
by lyyddj @ 2024-08-21 16:42:14