atelier.cpp:3: error: 'ifstream' does not name a type atelier.cpp:4: error: 'ofstream' does not name a type atelier.cpp: In function 'int main()': atelier.cpp:15: error: 'fin' was not declared in this scope atelier.cpp:23: error: 'k' was not declared in this scope atelier.cpp:23: error: expected ';' before ')' token atelier.cpp:31: error: lvalue required as left operand of assignment atelier.cpp:39: error: 'fout' was not declared in this scope