Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
102911 余彦铮 04圆的面积 C++ Compile Error 0 MS 0 KB 332 2024-12-27 16:14:49

Tests(0/0):

Code:

#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ float n; cin>>n; n=3.1415926*n*n; printf("%.2f",a/1); return 0; }

Run Info:

Main.cc: In function 'int main()':
Main.cc:11:15: error: 'a' was not declared in this scope
 printf("%.2f",a/1);
               ^