Ph.h头文件里已经有getPh方法了，直接引用这个头文件就行了 改成：include<stdio.h> include "Ph.h"int main(){ pHin1=7;k1=430.52124;s1=58.88031;a1=-0.01244;b1=7.31111;double m=getPh(1066, 7);printf("%f",m);return 0;} 变量要用extern申明 比如extern double k1;函数不用extern 也可以。还有一个前提是你使用的变量和函数在 "ph.h"里面不...
将fp = fopen(...)移动到变量声明下面来 fprintf(fp,"\n")函数第2个参数是格式,不是输出字串 void main(){ } 加一个void声明 此处不允许声明声明错误
else printf("Error!"); } } fprintf(fp,"\n"); fclose(fp); }运行后出现错误,其中前几个是int、float、double数据“declaration is not allowed here”,还有就是function should return a value ,最后一个错误是fprintf(fp,"\n"); 这行出现expected,不知道是怎么回事。我的目的主要是想把结果输出到一...
“java declaration not allowed here”错误的含义 在Java中,错误信息“declaration not allowed here”意味着编译器在某个不允许声明变量或方法的上下文中遇到了声明。这通常是因为声明的位置不符合Java的语法规则。 可能导致此错误的常见场景 在代码块外部声明变量:Java中所有变量和方法声明都必须在类或方法内部。 在...
1、问题描述 由于安装VS15 Preview 5,搞的系统由重新安装一次;在用vscdoe编译go语言时,出现以下问题: # odbc exec: "gcc": executable file not found in %PATH% exit status 2 2、解决方案 2.1 mingw 64 ... 解决Fatal error: Namespace declaration statement has to be the very first statement ...
这个编译错误消息指的是,在 typedef 声明中引入了一个匿名非C兼容类型,编译器为了链接处理给它了一个名字,但它建议添加一个标签名称来显式命名该类型,以便更好地支持 C 语言的兼容性和跨文件链接。 问题原因 在 C++ 中,匿名结构体和匿名联合体是合法的,它们可以在没有
There are two kinds of top-level code: top-level declarations and executable top-level code. Top-level declarations consist of only declarations, and are allowed in all Swift source files. Executable top-level code contains statements and expressions, not just declarations, and is allowed only as...
0 링크 번역 답변:Christian Bard2014년 1월 29일 I get a lot of error messages in header files: For example: invalid storage class for a parameter extern volatile u08 au08DevReqToDrvrOrPassDoorRe[8]; ^ a declaration here must declare ...
In C++, declaration and definition are often confused. A declaration means (in C) that you are telling the compiler about type, size and in case of function declaration, type and size of its parameters of any variable, or user-defined type or function in your program. No space is ...
“const” not allowed here static void q(this C); // Error: “static” not allowed here void r(int, this C); // Error: an explicit object parameter // can only be the first parameter }; // void func(this C& self); // Error: non-member functions cannot have // an explicit ...