Converting string into constant char *

#1

why are we converting it in strtok using str_c when string could function similarly without converting it into const char *??

#2

because strtok accepts only const char*

this is prototype of strtok
char * strtok ( char * str, const char * delimiters );

you can see it in documentation
http://www.cplusplus.com/reference/cstring/strtok/

i hope this helps
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if you have more doubts regarding this feel free to ask