Question: C++ - I'm having a problem with the while loop, I get two compile errors from that specfic line(line 46). invalid conversion from 'const char*'

C++ - I'm having a problem with the while loop, I get two compile errors from that specfic line(line 46).
"invalid conversion from 'const char*' to 'char'" "suggest parentheses around assignment used as truth value"
I'm extremely confused on where to go from here.
#include
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