Can I ask you why you want to learn C, rather than, for example, C++, C# or Java?
As for your question, can you be a bit more specific about what is it that you don't understand about arrays? Also, are you talking about static arrays or dynamically allocated ones? (Do you know the difference?)
Knowing C is a bit like knowing assembly, in that it gives you a lot of insight into how computers "actually work" than higher-level languages do.
An array is a continuous section of memory containing data of the same type...
int main() {
int mylist[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
int i;
for(i = 0; i < 10; i++) {
printf("%d ",i);
}
}I'm really a newb, so this may be wrong, but I've heard that: C++ is harder to learn for beginners (I've only known BASIC before)
#include <string>
#include <iostream>
int main()
{
std::string name;
std::cout << "Enter your name: ";
std::getline(std::cin, name);
std::cout << "Hello, " << name << "!" << std::endl;
}For example, try to do this in C:
#include <stdio.h>
int main(){
char* name = NULL;
size_t len;
printf("Enter your name: ");
getline(&name, &len, stdin);
printf("Hello, %s!\n", name);
return 0;
}getline(&name, &len, stdin);
Is the correct at all?
#include <iostream>
#include <time>
int main()
{
// random seeding and variable declaration
srand(time(NULL));
int x = 1+rand()%10;
int y = 1+rand()%10;
// asking for user input
printf("Add these two numbers together: %d and %d\n", x, y);
int z;
std::cin >> z;
int answer = 1+(rand()%3);
// checking the user input
if (z == x+y)
if (answer == 1)
printf("Correct!\n");
else
if (answer == 2)
printf("Congrats!\n");
else
printf("That's the right answer!\n");
else /*if (z != x+y)*/ // commented out because it is always either true or false, no need to check it again
printf("Sorry, that's incorrect.\n");
return 0;
}#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main()
{
const char* const msgs[] =
{ "Correct!", "Congrats!", "That's the right answer!" };
const int msgsAmount = sizeof(msgs)/sizeof(msgs[0]);
srand(time(0));
int n1 = 1 + rand() % 10, n2 = 1 + rand() % 10, answer;
printf("Add these two numbers together: %d and %d\n", n1, n2);
scanf("%d", &answer);
if(answer == n1+n2) printf("%s\n", msgs[rand() % msgsAmount]);
else printf("Sorry, that's incorrect.\n");
return 0;
}
#include <stdio>
#include <stdlib>
#include <conio>
#include <time>
#define maxNumber 100
#define maxGuess 10
void seedNum(int n1, int n2);
int main()
{
int n1, n2, answer;
seedNum(n1, n2);
int numGuess = 0;
while (numGuess != maxGuess)
{
printf("Add these two numbers together: %d and %d\n", n1, n2);
scanf("%d", &answer);
if (answer == (n1 + n2))
{
printf("Correct! Now follows a new one...\n");
seedNum(n1, n2);
numGuess = 0;
}
else
{
printf("Sorry, that's incorrect.\n");
numGuess++;
}
}
printf("Game Over.\n");
// send any awaiting chars in input buffer and wait for a key press...
fflush(stdout);
getch();
return 0;
}
void seedNum(int n1, int n2)
{
srand(time(0));
n1 = 1 + rand() % maxNumber;
n2 = 1 + rand() % maxNumber;
}
ugh, I'm terrible at this. :(
The C standard library consists of a set of sections of the ISO C standard which describe a collection of header files and library routines used to implement common operations, such as input/output and string handling, in the C programming language.
The C programming language uses libraries as its primary method of extension. In C, a library is a set of functions contained within a single "archive" file. Each library typically has a header file, which contains the prototypes of the functions contained within the library that may be used by a program, and declarations of special data types and macro symbols used with these functions.
Since many programs have been written in C, there are a wide variety of other libraries available. Libraries are often written in C because C compilers generate efficient object code; programmers then create interfaces to the library so that the routines can be used from higher-level languages like Java, Perl, and Python.
Then there are also the so-called static libraries. ... disk space is saved (because the object files of the library are not copied in your disk for each program source code which uses that library).
But wouldn't using many static libraries be more space-consuming than using one dynamic?
What if I wanted to make an executable without any library (including libc) dependencies? Would that be simple? Would it even be possible?
Hello, World!
ello, World! H
llo, World! He#include <stdio.h>
#define LTH 13
int main()
{
int arr[LTH] = {'H', 'e', 'l', 'l', 'o', ' ', 'W', 'o', 'r', 'l', 'd', '!', ' '};
int n, p;
for(n = 0; n < 30; n++)
{
for(p = 0; p < LTH ; p++)
{
printf("%c", arr[p + n]);
if(p + n == LTH)
p = -n;
}
printf("\n");
}
return 0;
}
ello, World!
ello, World!
ello, World!for(p = 0; p < LTH ; p++) { printf("%c", arr[p + n]); if(p + n == LTH) p = -n; }
not the solution handed on a silver platter…
