I didn't understande the concept of (char*)str.c_str()?

#1

what does str.c_str() func does?

#2

hello @sahasoumyajit2020

see string is a class in c++ but strtok takes char * in its input .
so thats why we are using c_str function . it converts the c++ string into c based string(char *) and returns its base address.

#3

then why are we again type casting it with (char*)?

#4

c_str() is a function that converts c++ string into char array(c type string) and return its base address as( const char *).

now look at the declaration of strtok.

ss

here it takes char * type pointer but we have const char * pointer
so first we need to explicitly convert const char * to char *
thats the reason why we have (char*) str.c_str()

char *s = strtok( (char * ) str.c_str() , " ");
#5

ohh thnks now i got it

#6

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