Fgets to read dynamicallly 4m keyboard????

[ganesh bala]

How to read dynamically( any no of chars) from Keyboard using fgets...

I am new to fgets.. Help me please......

I tried ... where i have to make change...

int main()
{
    char *str,*str1;int i=1;
    printf("Enter the string");
       str=(char *) malloc(sizeof(char)*40);
       str1=str;
       fgets(str,40,stdin);
       printf("%s",str1);
        while (str[strlen(str) - 1] != '\n')
         {   
              ++i;
              str=(char *)realloc(str,sizeof(char)*40*i);
                fgets(str,40,stdin);
                printf("%s",str1);
                }
                
                printf("\n Now String contains %s",str1); // contains only last 40 chars..
                
                system("pause");
                
                }

[matsp]

If you want to read "any number" of characters, then you either have to start with a buffer big enough for "any number" (there is a limit to how much you can reasonably expect a human to type into a line, not to mention that MOST OS's have a limit to how long a line can be).

Or you have to do something along the lines of what you are doing now, but reallocate the string as you go along, and concatenate together the parts.

Or use getchar() or similar to read a character at a time, and expand the buffer (using realloc) as you run out of buffer.

--
Mats

[ganesh bala]

Thanks matsp for ur Timely help....

Now its Working ............

while...........
{
 ++i;
              str=(char *)realloc(str,sizeof(char)*40*i);
                fgets(dummy,40,stdin);
                strcat(str,dummy);
               
                }