Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
157045 周谨严 11计算分段函数的值 C++ Compile Error 0 MS 0 KB 242 2026-07-13 11:54:47

Tests(0/0):

Code:

#include<iostream> using namespace std; int main(){ int n,y; cin>>n; if(0<=n&&n<5){ printf("%.3lf",n+2.5); } else if(5<=n&&n<10){ printf("%.3lf",2-1.5*(n-3)*2); } else if(10<=x&&x<20){ printf("%.3lf",n/2-1.5); } }

Run Info:

Main.cc: In function 'int main()':
Main.cc:12:14: error: 'x' was not declared in this scope
  else if(10<=x&&x<20){
              ^
Main.cc:4:8: warning: unused variable 'y' [-Wunused-variable]
  int n,y;
        ^