错误解释

CompileError!

编译信息

main.cpp: In function \xe2\x80\x98int main()\xe2\x80\x99:\nmain.cpp:18:17: error: return-statement with no value, in function returning \xe2\x80\x98int\xe2\x80\x99 [-fpermissive]\n 18 | return;\n | ^~~~~~\n