Navigation:  Programming language SQC > Built-in functions > Filesystem > write

The write() function attempts to write n bytes from buffer to the file associated with handle.

 

int write(int handle,char *buffer, int nbyte);

 

 

Example :

 

 

#define EMBEDTRON "www.embedtron.com"

#define BUFFER_SIZE 20

 

int main() 

{

    char buffer[BUFFER_SIZE];

    

    int len = 0;

    int fh  = 1;

 

    if((fh=open("file.txt","w" )) == -1) 

    {

        printf("Create file failed");

        return -1;

    }

 

    if((len = write(fh,EMBEDTRON,strlen(EMBEDTRON))) != strlen(EMBEDTRON))

    {

        printf("Write data failed");

        return -2;

    }

 

    close(fh);

    

    if((fh=open("file.txt","r" )) == -1) 

    {

        printf("Create file failed");

        return -1;

    }

 

    lseek(fh, 0, SEEK_END);

    len = tell(fh);

 

    lseek(fh, 0, SEEK_SET);

    if((len = read(fh,buffer,BUFFER_SIZE)) != strlen(EMBEDTRON))

    {

        printf("Read data failed");

        return -3;

    }

 

    buffer[len] = '\0';

 

    printf("String = %s Size = %d \n",buffer,len);

    

    close(fh);

    

    return 0;

 }