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There is a complex statement in my textbook:
int (*f(float (*)(long),char *))(double);
I want to create an example for illustrating how to use this statement, although I understand the meaning of the statement, it's hard for me to write the example. Can anyone help me?
P.S.: C language.
int (*f(float (*)(long),char *))(double)
f is a function that has 2 parameters of type
float (*)(long), << pointer to function long=>float
char * << string
and returns
(int)(*)(double) << a pointer to a function double=>int
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I wrote this code in my project but every time i run it the answer is diffrent.
]1
Initialize sum with a value of 0. The reason it is different every time is you are calling sum which you never assigned a value. Anything could be in memory where sum is stored, which is why your results are inconsistent.
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I want to print out each integer of an int individually using a for loop. I am doing this because I want to print things in between some of the single ints. So if the number was 4564, I want to print out 4 5 6 4. Is there a quick way to do this?
I know how to do it in java but I am new to C and am not sure.
Something like this shall help
while(num!=0) {
printf("%d", num%10); //your last digit, you can store it in an array of characters as well
num = num/10 ;
}
Note : you've got to reverse the order while using the digits
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I want to display the contents of an array with type double that has a length of 5 without using the [ ] indexing . I can only use a for loop and pointer techniques.
How can you achieve that ?
Can anyone give me a brief explanation of pointers as I have no idea how to use them exactly ?
The array indexing operator is a shorthand for hiding pointer arithmetic.
So if you have an array like this:
double a[5];
Instead of using this expression:
a[1]
You can use this:
*(a + 1)
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When using C programming language, I have no idea how to put a user input to an array.
I need to get integers from the user in from of:
printf("Enter numbers. Separate each by a comma: ");
How can I put each number into an array?
This is a very helpful link
Also look up this too for clarification on Console.Read & Console.Readline
Difference between Console.Read() and Console.ReadLine()?
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For example, let's say I have the decimal number 10.
I want to be able to go form an integer of 10 to a string of "0a".
How do I do that?
Note: I don't want anything printed out.
You can use sprintf to represent a numeric value in hexadecimal format:
sprintf(buff, "%0.2x\n", 10)
Take also a look at dmckee's comment on int/hexadecimal misunderstanding.