gets()和scanf（）混用问题

scanf(..);输入字符按下回车键后，gets()函数会把回车键当做输入的字符。所以在执行gets()前要把回车过滤掉！！

改正后代码：

#include

main()

{

  char a1[5] = "",a2[5] = "",a3[5] = "",a4[5] = "";

scanf("%s%s",a1,a2);

printf("a1=%s\n",a1);

printf("a2=%s\n",a2);

printf("a3=%s\n",a3);

printf("a4=%s\n",a4);

printf("请输入a3:");

getchar();    //过滤回车

gets(a3);printf("a1=%s\n",a1);

printf("a2=%s\n",a2);

printf("a3=%s\n",a3);

printf("a4=%s\n",a4);

printf("请输入a4:");

gets(a4);

printf("a1=%s\n",a1);

printf("a2=%s\n",a2);

printf("a3=%s\n",a3);

printf("a4=%s\n",a4);

}