这个代码有错吗

#include<stdio.h>

int main(void)

{

 char c='a';

 unsigned i=97;

 printf("%c,%u\n",c,c);

 printf("%c,%u\n",i,i);

 return0;

}

--------------------Configuration: zii - Win32 Debug--------------------

Compiling...

zii.cpp

C:\Program Files (x86)\Microsoft Visual Studio\MyProjects\zii\zii.cpp(8) : error C2065: 'return0' : undeclared identifier

C:\Program Files (x86)\Microsoft Visual Studio\MyProjects\zii\zii.cpp(9) : warning C4508: 'main' : function should return a value; 'void' return type assumed

执行 cl.exe 时出错.

zii.exe - 1 error(s), 0 warning(s)