使用complex.h库在Visual Studio 2013中编译C代码

http://blogs.msdn.com/b/vcblog/archive/2013/07/19/c99-library-support-in-visual-studio-2013.aspx

C99支持添加了visual studio 2013，但我无法在我的“C”代码中使用complex.h。

#include  #include  int main(void) { double complex dc1 = 3 + 2 * I; double complex dc2 = 4 + 5 * I; double complex result; result = dc1 + dc2; printf(" ??? \n", result); return 0; } 

我得到语法错误。

编辑：抱歉缺少部分。

 error C2146: syntax error : missing ';' before identifier 'dc1' error C2065: 'dc1' : undeclared identifier error C2088: '*' : illegal for struct error C2086: 'double complex' : redefinition error C2146: syntax error : missing ';' before identifier 'dc2' error C2065: 'dc2' : undeclared identifier error C2088: '*' : illegal for struct error C2086: 'double complex' : redefinition error C2146: syntax error : missing ';' before identifier 'result' error C2065: 'result' : undeclared identifier error C2065: 'result' : undeclared identifier error C2065: 'dc1' : undeclared identifier error C2065: 'dc2' : undeclared identifier error C2065: 'result' : undeclared identifier IntelliSense: expected a ';' IntelliSense: expected a ';' IntelliSense: expected a ';' IntelliSense: identifier "result" is undefined IntelliSense: identifier "dc1" is undefined IntelliSense: identifier "dc2" is undefined 

Answer 1

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_Dcomplex dc1 = {3.0, 2.0};

用于变量声明。

从查看VS2013的“complex.h”标题，似乎微软决定自己实现C复数。 你必须使用real（）和imag（）函数实现自己的算术运算符，即：

 double real_part = real(dc1) + real(dc2); double imag_part = imag(dc1) + imag(dc2); _Dcomplex result = {real_part, imag_part};