View Compilation Error

0_0_8406753_13662.cpp: In function `int main()':
0_0_8406753_13662.cpp:107: error: `charstr1' undeclared (first use this function)
0_0_8406753_13662.cpp:107: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8406753_13662.cpp:107: error: `str2' undeclared (first use this function)
0_0_8406753_13662.cpp:110: error: `str1' undeclared (first use this function)