Reading multiple lines of input with scanf()

Question

Relevant code snippet:

char input [1024];

printf("Enter text. Press enter on blank line to exit.\n");
scanf("%[^\n]", input);

That will read the whole line up until the user hits [enter], preventing the user from entering a second line (if they wish).

To exit, they hit [enter] and then [enter] again. So I tried all sorts of while loops, for loops, and if statements around the scanf() involving the new line escape sequence but nothing seems to work.

Any ideas?

Answer 1

Try this:

while (1 == scanf("%[^\n]%*c", input)) { /* process input */ }

Answer 2

#include <stdio.h>
int main(){
    char arr[40];
    int i;
    for( i = 0; i < sizeof(arr); i +=2 ){
        scanf("%c%c",&arr[i],&arr[i+1]);
        if( arr[i] == '\n' && arr[i+1] == '\n' )
            break;
    }
    printf("%s", arr);
    return 0;    
}