My console doesn't support Right-to-Left characters, but I don't think it will work :c
Here are some entries anyway:
Brainfuck, 40 bytes (1st entry)
++++++++++>,[>,]<[<]>[[<+>-]<[<]>[.>]>]
C, 74 bytes
char m[2<<9];i;main(){do{m[i]=getchar();printf("%s ",m);}while(m[i++]>0);}
C, 105 bytes
m[2<<9];i;j;k;main(){while((m[i++]=getchar())<0);for(;j<i;j++,putchar(10))for(k=0;k<j;k++)putchar(m[k]);}
Ungolfed:
++++++++++> # Store 10 (Newline)
,[>,] # Store input
<[<]> # Goto first character
[ # While next character
[<+>-] # Copy character to the left
<[<]> # Goto first character
[.>] # Print all charaters
> # Go to next character
]
#include <stdio.h>
// char, because `printf("%s", str);` expects a array of characters.
char str[2<<9];
int str_len = 0;
int main(void) {
do {
str[str_len]=getchar();
printf("%s ", str);
} while(m[i++]>0);
return 0;
}
#include <stdio.h>
int str[2<<9];
int str_len = 0;
int main(void) {
do {
str[str_len] = getchar();
} while(str[str_len++] != EOF);
int i;
for(i=0; i<str_len; i++) {
int j;
for(j=0; j<i; j++) {
putchar(str[j]);
}
putchar(10);
}
}
