View Compilation Error

163750_0_10539.cpp: In member function `bool inf::isIN(int, int, char)':
163750_0_10539.cpp:19: error: `line' undeclared (first use this function)
163750_0_10539.cpp:19: error: (Each undeclared identifier is reported only once for each function it appears in.)
163750_0_10539.cpp: At global scope:
163750_0_10539.cpp:70: error: `inf line[2100]' used prior to declaration