程序代码：

#include <stdio.h>
#include <stdlib.h>

void
main(void)
{
    char *s = (char *)malloc(sizeof(char) * 100);
    int i = 0;
    int c;
    while(c = fgetc(stdin) != '\n'&&c != EOF)
    {
         s[i++] = c;
    }
    s[i] = '\0';
    printf("%s\n",s);
    free(s);
}