0_0_16195250_6808.cpp:3:11: error: '::main' must return 'int' void main(){ ^ 0_0_16195250_6808.cpp: In function 'int main()': 0_0_16195250_6808.cpp:27:2: error: return-statement with no value, in function returning 'int' [-fpermissive] return; ^