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#include <iostream>
using namespace std;
 
int main()
{
	auto f1 = [](int a){return 0;};
	auto f2 = [](int a){if(a == 1) return 0; else return 2;};
	auto f3 = [](int a){if(a == 1) return 0; else return 2.3};
	auto f4 = [](int a){if(a == 1) return 1.2; else return 2.3};
}

prog.cpp: In lambda function:
prog.cpp:8:55: error: inconsistent types ‘int’ and ‘double’ deduced for lambda return type
  auto f3 = [](int a){if(a == 1) return 0; else return 2.3};
                                                       ^~~
prog.cpp:8:58: error: expected ‘;’ before ‘}’ token
  auto f3 = [](int a){if(a == 1) return 0; else return 2.3};
                                                          ^
prog.cpp: In lambda function:
prog.cpp:9:60: error: expected ‘;’ before ‘}’ token
  auto f4 = [](int a){if(a == 1) return 1.2; else return 2.3};
                                                            ^

Standard output is empty