numar1.cpp:4: error: expected ',' or ';' before 'ofstream' numar1.cpp: In function 'int main()': numar1.cpp:18: error: expected initializer before 'cin' numar1.cpp:28: error: 'f' was not declared in this scope numar1.cpp:33: error: 'f' was not declared in this scope numar1.cpp:37: error: 'nr' was not declared in this scope numar1.cpp:39: error: 'cout' was not declared in this scope numar1.cpp:39: error: 'nr' was not declared in this scope