>>339 あんまり確認せずに条件反射レス
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define BUF_SIZE 256

int main()
{
    char *p, *q, buf[BUF_SIZE];

    scanf("%s", buf);
    if(q = strchr(buf, '\n'))
        *q = '\0';

    p = (char*)malloc(sizeof(char)*strlen(buf));
    strcpy(p, buf);
    printf("%s\n", p);

    free(p);

    return 0;
}