one or more multiply defined symbols found 编译出错
#include <stdio.h>void main()
{
//换行符'\n',用于输出换行
printf("How are you ?\n");
printf("I am fine .\n\n ");
//横向跳格符'\t',使跳到下一个输出区
printf("How are you ?\t");
printf("I am fine .\n\n");
//退格符'\b',使当前的输出位置退一格,既输出的起始位置左移一位
printf("How are you?\n");
printf(" \b I am fine .\n\n");
//回车符'\r',使当前输出位置回到本行开头
printf(" I am fine.");
printf("\rHow are you ?\n\n");
//多个转义字符的混合运用
printf("note:\n a s\ti\b\bk\rp\n");
}
以上是我按照书上敲上去的为什么会出错