#include <stdio.h>
#include <stdlib.h>
char * getline(void) {
char * line = malloc(100), * linep = line;
size_t lenmax = 100, len = lenmax;
int c;
if(line == NULL)
return NULL;
for(;;) {
c = fgetc(stdin);
if(c == EOF)
break;
if(--len == 0) {
len = lenmax;
int linelen = (line-linep);
char * linen = realloc(linep, lenmax *= 2);
if(linen == NULL) {
free(linep);
return NULL;
}
// line = linen + (line - linep);
line = linen+linelen;
linep = linen;
}
if((*line++ = c) == '\n')
break;
}
*line = '\0';
return linep;
}
int main()
{
char * ptext = NULL;
printf("enter some text: ");
ptext = getline();
printf("\n\nthe text you entered was :\n\n");
for(; !(*ptext=='\0') ; ++ptext)
printf("%c", *ptext);
return 0;
}