c programming create a file

//
// Created by jia on 06/01/19.
//
#include "../header.h"
const char* path;
const char* path_0 = "/home/jia/Documents/";
const char* file_name;
const char* content;

void init_file(){
    path = malloc(sizeof(char) * BUFF);
    strcat(path, path_0);
    file_name = malloc(sizeof(char) * 20);
    printf("Please input your file name:");
    scanf("%s", file_name);
    strcat(path, file_name);
    content = malloc(sizeof(char) * BUFF);
}


void create_file(){

    init_file();

    FILE* create_file;

    create_file = fopen(path, "w");
    if(create_file == NULL){
        printf("ERROR");
        exit(1);
    }else{
        content = "Hello, my name is Jia";
        fprintf(create_file, "%s", content);
        printf("\nFile had been created please check the path: %s", path);
        fclose(create_file);
    }
}
void read_file(){
    init_file();

    FILE* readfile = fopen(path, "r");
    if(readfile == NULL){
        printf("ERROR");
        exit(1);
    }else{
        //read all the lines
        /*char last;
        do{
            last = fgetc(readfile);
            printf("%c", last);
        }while(last != EOF);*/

        //read only one line
        fscanf(readfile, "%[^\n]", content);
        printf("%s\n", content);
        fclose(readfile);

    }
}