c++,visual-studio,include,math.h
Right-click your project, go to Properties, then go to VC++ Directories and open the editor for Include Directories. There should be a tick box labelled "Inherit from parent or project defaults". You will see that Visual Studio includes some predefined directories. If the box is already ticked and Visual Studio...
180 / pi is one radian IN DEGREES. But the sin() function takes a value in radian. So it's just sin(1).
I think you have missing parentheses. In the output line, the first value is (data[i][8]/dp)/2, but that's not what you're using in function call (spaces added for clarity): -log( tan( acos( data[i][8]/dp ) /2) ) Correct line should be: cout << (data[i][8]/dp)/2 << " : " << -log(tan(acos((data[i][8]/dp)/2))) << endl;...
This is quite strange behavior for MSVS. 1) Try to create empty project (without precompiled headers) 2) Try changing #include <math.h> to #include <cmath> If this not help as well as creation of new empty project, the only way is to ensure that no viruses at your PC and re-install...
printf("Hello world! %d\n",pow(2,2)); "The output of this code should be Hello world! 4 right?" No. As this is undefined behavior, anything can happen. As @Mureinik posted what likely happens in this errant situation, you could have a possible understanding of why you saw 0. But in the end, C does...
Any standard header is allowed to include any other standard header.
I don't think that is the command you're running (well, it may be one of them, but it's certainly not the one causing your error). The -c option to gcc tells it to only create the object files (and you're specifically sending the output to sparse_matrix.o, an object file rather...
c++,identifier,math.h,gamma-function
The reason why you cannot use tgamma is because your compiler doesn't support the standard in which it was introduced. You'll need to use a compiler / standard library that does support c++11 or use another implementation of tgamma as advised in an answer to in a similar question What...
c,int,double,type-conversion,math.h
The trigonometric functions in math.h use radians, not degrees. You can convert the radians to degrees by multiplying by 180 / pi, ( 57.29577951308232). acos(0.13) would return 1.440427347091751 radians which multiplied by 57.29577951308232 gives the result of 82.53040768358306 degrees....
Your array is declared as: solvent_p solvent[4000]; but you have this loop: for(i=0;i<=9999;i++) with this function call inside: printf("1 :%d \t %f \t %f \n",j,solvent[j].rx,solvent[i].ry); which means you are accessing out-of-bounds array elements. EDIT: OP test case has been edited to fix the out-of-bound accesses. My second suggestion is to...
gcc can use builtin functions in many cases, their documentation says: Many of these functions are only optimized in certain cases; if they are not optimized in a particular case, a call to the library function is emitted. so therefore gcc will not need to link against the math library...
android,c++,math,android-ndk,math.h
I Finally got to some conclusion about how to "solve" the problem, though I am kinda lost why this was happening in the first place. I am actually coding an app which links to several c++ libraries, which is the common code between iOS and Android apps. When the math...
c,floating-point-conversion,math.h
They are fundamentally different. Cast to int will truncate the non-integer part toward 0. floor will do the same, but toward, -infinity. Example: double d = -1.234; printf("%d %d\n", (int)d, (int)floor(d)); Yields: -1 -2 ...
c++,visual-studio-2013,compilation,syntax-error,math.h
The problem could be the header itself - C++ has provided its own equivalent libraries for old C libraries. They take the format of: c[library name] Where [library name] is replaced by the old C library MINUS the .h extension. To include math.h from the C library in a C++...