#include <stdio.h>
#include <stdlib.h>
#include <string.h>
// using strlen() which in <string.h>
int main()
{
char *name;
int count;
printf("enter the length of the string: ");
scanf("%d", &count);
// dynamic allocation
name = (char*)malloc((count+1)*sizeof(char));
// count+1: end char '\0' included
printf("enter the string: ");
scanf("%s", name); // content of pointer name dep on %s
printf("the length of ""%s"" is %d\n", name, strlen(name));
// strlen(name) <= count due to dynamic allocation
system("pause");
return 0;
}