strlen的问题

C/C++ code

#include <iostream>#include <cstring>#include <cstdio>using namespace std;float var;int main(){  char buffer[32];  cout << "Value :";  cin  >> var;    sprintf(buffer ,"$ %.0f", var);  cout << "UnFormatted :" << buffer <<endl;    short  len=strlen(buffer);  cout << "buffer length"  << len <<endl;  return 0;}

输入var=123
经过sprintf格式化后，为什么长度是5？？难道多出来的时因为加上了结束的\0??

[解决办法]
Value :123
UnFormatted :$ 123
buffer length5
Press any key to continue

$ 123 这个不是5？
[解决办法]

探讨

C/C++ code

#include <iostream>
#include <cstring>
#include <cstdio>

using namespace std;


float var;

int main()
{
char buffer[32];
cout << "Value :";
cin >> var;

sprintf(buffer ,"$ %.……

[解决办法]
sprintf(buffer ,"$ %.0f", var);

多了"$ "
[解决办法]
我晕，

C/C++ code

sprintf(buffer ,"$ %.0f", var);