c fputs() & fgets()
fputs() in c
Declaration:
int fputs(const char *str, FILE *fptr);
This function fputs(const char *str, FILE *fptr) writes the null terminated string pointer to by str (constant char) to a file associated with file pointer.fptr so the null character that marks the end of string is not written to a file. on the success it returns EOF on error or a non negative value.
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/* program to understand the use of fputs() */
main()
{
*fptr;
ch[40];
((fptr=fopen("myfile","w"))==NULL)
{
printf("Can't open file Error" );
(1);
}
printf("Enter the string \n" );
printf("to stop enter ctrl+d \n" );
(gets(ch)!=NULL)
{
fputs(ch,fptr);
fclose(fptr);
}
0;
}
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fgets()
Declaration:
char *fgets(char *ch ,int n, FILE *fptr);
This function *fgets(char *ch ,int n, FILE *fptr) is use to read characters from a file and these all characters are stored in the string pointer to ch. It reads n-1 characters from the file and where n is the second argument in the *fgets(char *ch ,int n, FILE *fptr) and the third argument fptr is a file pointer. which is associated with a file. and This function returns the string pointed to by ch on success, and return NULL on error or on end of file
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/* program to understand the use of fgets() */
main()
{
ch[50];
*fptr;
((fptr=fopen("myfile","r"))==NULL)
{
printf("Error can't open file");
(1);
}
(fgets(ch,50,fptr)!=NULL)
{
puts(ch);
}
fclose(fptr);
0;
} |