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  1.     #include <iostream>
  2.  
  3.     int i = 0;
  4.     int main() {
  5.         int i = 1;
  6.         for (int i = 0; i < 10; ++i) {
  7.             int i = 2 * i;
  8.             std::cout << i << std::endl;
  9.         }
  10.         return 0;
  11.     }
  12.  
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:7:17: error: redeclaration of ‘int i’
             int i = 2 * i;
                 ^
prog.cpp:6:18: error: ‘int i’ previously declared here
         for (int i = 0; i < 10; ++i) {
                  ^
prog.cpp:5:13: warning: unused variable ‘i’ [-Wunused-variable]
         int i = 1;
             ^
stdout
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Standard output is empty
https://ideone.com/PQek9s
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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