首先需要#include <stdio.h>int scanf( const char *format, ... );scanf()函数是格式化输入函数，它从标准输入设备(键盘) 读取输入的信息。第一个参数format为一个常量字符串，这个字符串中如果包含‘%’符号则使用后续参数进行匹配如：scanf("%d%d", &a, &b);(First, we need #include <stdio.h>int scanf (const char *format,...); scanf () function is formatted input function, which reads input information from the standard input device (keyboard). The first parameter format is a constant string. If the string contains "%" symbol, we use the following parameters to match, for example, scanf ("%d%d", &amp;a, &amp;b).)