How to use string.substr() function?

Question

I want to make a program that will read some number in string format and output it like this: if the number is 12345 it should then output 12 23 34 45 . I tried using the su

Answer 1

You can get the above output using following code in c

#include
#include
#include
int main()
{
  char *str;
  clrscr();
  printf("\n Enter the string");
  gets(str);
  for(int i=0;i