error: non-void function does not return a value [-werror,-wreturn-type] 是一个编译错误,通常出现在C或C++编程中。这条错误信息表明,一个被声明为非void类型的函数在所有可能的执行路径上都没有返回值。换句话说,编译器在编译过程中发现该函数存在无法返回预期值的路径。
用clang++编译同样类似警告也通过了,但执行出现异常指令。 gaojie@root-host:~$ clang++bool.cppbool.cpp:12:1: warning: non-voidfunction does notreturna value [-Wreturn-type] };^1warning generated. gaojie@root-host:~$ ./a.outyes 非法指令 (核心已转储) 本着好奇的心理,就想知其原因为啥会有不...
#include <stdio.h> int hello() { return 233; } int print_data(int* data, int len) { for (int i = 0; i < len; i++) { printf("%d ", data[i]); } printf("\n"); // here the return statement is missing, the compiler will generate an UB //hello(); } void example1()...
The following sample code long offset(long v) { if (!v) return 0; if (v > 0) return 1; if (v < 0) return -1; } produces warning: non-void function does not return a value in all control paths [-Wreturn-type] So does long offset(long v) {...
gen::functionDefinitionEnd(); if (!gen::functionDefinitionEnd()) { error::out() << fnName.loc << ": warning: non-void function does not " << "return a value in all control paths\n"; } } /*21 changes: 19 additions & 2 deletions 21 gen/function.cpp Original file line number...
一个函数被编译的时候,编译器不仅仅看if条件内的return语句,编译器还看if条件外的return语句,如果if语句外没有return,编译器就会报错。---这个是编译器语法检测哪一章的知识 #include <stdio.h> //#define COMPANY_NAME 3 int g_company_name = 1; int ...
Consequently, putting an empty return statement at the end of a void function is redundant: #include <iostream> // void means the function does not return a value to the caller void printHi() { std::cout << "Hi" << '\n'; return; // tell compiler to return to the caller -- ...
"warning: control may reach end of non-void function [-Wreturn-type] runtime error: execution reached the end of a value-returning function without returning a value" At the two initial if's. However, when I compile on my IDE, there is no such warning. Any clues about ...
控制到达非void函数的结尾。 一些本应带有返回值的函内数到容达结尾后可能并没有返回任何值。 这时候,最好检查一下是否每个控制流都会有返回值。 我是ostream声明的时候没有写return out;产生的错误。 参考:https://zhidao.baidu.com/question/1860183282073653227.html...
Building ngs 0.2.16 I see this warning: malloc.c:71:1: warning: non-void function does not return a value in all control paths [-Wreturn-type] } ^ 1 warning generated.