factura.cpp: In function `int main()': factura.cpp:9: `i' undeclared (first use this function) factura.cpp:9: (Each undeclared identifier is reported only once for each function it appears in.) factura.cpp:11: `d' undeclared (first use this function) factura.cpp:20:33: warning: no newline at end of file factura.cpp:20: parse error at end of input