View Compilation Error

0_0_29545963_21013.cpp: In function 'int main()':
0_0_29545963_21013.cpp:17:29: error: invalid conversion from 'char*' to 'int' [-fpermissive]
    else if(!f4&&strchr(b,str))f4=1;
                             ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:48:0,
                 from 0_0_29545963_21013.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/cstring:104:3: note: initializing argument 2 of 'char* std::strchr(char*, int)'
   strchr(char* __s, int __n)
   ^