src.cpp: In function 'int main()':
src.cpp:46:12: error: lvalue required as left operand of assignment
for(i=1=i<=n;i++)
^
src.cpp:46:21: error: expected ';' before ')' token
for(i=1=i<=n;i++)
^
src.cpp:47:22: error: 'd' was not declared in this scope
if(ch[i]==0) d++;
^
src.cpp:48:11: error: 'd' was not declared in this scope
cout<<d<<endl;
^