View Compilation Error

0_0_24774451_18500.cpp:1:112: fatal error: GCC4.9.2/lib/gcc/x86_64-w64-mingw32/4.9.2/include/iostream>usin: Invalid argument
 #include <iostream>using namespace std;int main (){for( long int a = 1; a < 1000000; a = a + 1 ){a=1}return 0;}
                                                                                                                ^
compilation terminated.