c语言用pelles c 7.0编译中的一个问题,求大神们帮帮我

char* pWord=strtok_s(str,&str_len,delimiters,&ptr);
提示是这句报错
错误原因
error #2168: Operands of '=' have incompatible types 'char *' and 'int'.
warning #2018: Undeclared function 'strtok_s' (did you mean 'strtok'?); assuming 'extern' returning 'int'.

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