View Compilation Error

0_0_24970677_10536.cpp:29:33: error: empty character constant
             if(a[i]=='0'||a[i]=='')a[i]='\0';
                                 ^
0_0_24970677_10536.cpp: In function 'void fun(char*)':
0_0_24970677_10536.cpp:47:1: error: a function-definition is not allowed here before '{' token
 {
 ^
0_0_24970677_10536.cpp:63:1: error: expected '}' at end of input
 }
 ^