culmi.cpp:5: error: 'ifstream' does not name a type culmi.cpp:6: error: 'ofstream' does not name a type culmi.cpp: In function 'int main()': culmi.cpp:15: error: 'fin' was not declared in this scope culmi.cpp:19: error: 'x' was not declared in this scope culmi.cpp:21: error: 'nrss' was not declared in this scope culmi.cpp:23: error: 'v' was not declared in this scope culmi.cpp:30: error: 'nrss' was not declared in this scope culmi.cpp:33: error: 'v' was not declared in this scope culmi.cpp:40: error: 'fout' was not declared in this scope culmi.cpp:40: error: 'nrss' was not declared in this scope