#ifndef _C_STRING_H
#define _C_STRING_H

typedef unsigned int size_t;

size_t strlen(const char* str);
char* strcpy(char* dest, const char* src);
char* strncpy(char* dest, const char* src, size_t num);
char* strcat(char* dest, const char* src);
int strcmp(char* str1, char* str2);
int strncmp(char* str1, char* str2, size_t num);
const char* strchr(const char* str, char ch);
const char* strstr(const char* str1, const char* str2);

#endif