Terminating a program using carriage return in C -

quesion: write c program accept line of text. store in array & write out backwards. allow length of line unspecified terminated carriage return assume not exceed 80 characters solution:

#include <stdio.h>  int main() {     printf("\nenter sentence:\n");     char sent[80]; // creates array of length 80     int = 0;     while((sent[i] = getchar()) != '\n')     {         i++;     }     sent[i] = '\0';        printf("the reversed sentence : ");     for(i=i-1; i>=0; i--)     {         printf("%c", sent[i]);        }     getchar();     scanf("%c", &sent[i]);     return 0; } 

is code correct? (i wondering carriage return part)

what if enter 80 characters??? end putting '\0' @ sent[81], bad...

sent[80] '\n' , sent[81] '\0'

also not sure why do

getchar(); scanf("%c",&sent[i]); 

at end of function. @ point -1.