#include <stdio.h>
 #include <ctype.h>
 #define MAX 50

 int main(void){
     char str[MAX] = "0";             //initialise 1st char for the loop
     int i;
     printf("Enter your sentence, at most 50 character: n");
     for(i = 0; str[i] != 'n'; i++){          //terminates upon n
        str[i] = getchar();
        putchar(str[i]);
     }
     return 0;
 }

#include <stdio.h>
#include <ctype.h>
#define MAX 50

int main(void){
    char str[MAX] = "0";             //initialise 1st char for the loop
    int i;
    printf("Enter your sentence, at most 50 character: n");
    for(i = 0;; i++){          //terminates upon n
        str[i] = getchar();
        putchar(str[i]);
        if(str[i] == 'n')
        break;
    }

    return 0;
}