Looking into the similarities between C language and C++
C language and C are two very popular programming languages. They are very similar in many aspects. This article will discuss their differences in detail in terms of syntax, data types, functions, object-oriented, etc. similarities and provide code examples to illustrate.
First of all, the basic grammatical structure of C language and C are very similar. They both follow the "semicolon ending" rule and use braces to define code blocks, etc. For example, the following is an example of a simple C language function and C function:
// Define a simple function in C language
#include <stdio.h>
void sayHello() {
printf("Hello, World!
");
}
int main() {
sayHello();
return 0;
}// Define a simple function in C
#include <iostream>
void sayHello() {
std::cout << "Hello, World!" << std::endl;
}
int main() {
sayHello();
return 0;
}As you can see, the function definition and calling methods in the above two examples are very similar, except for the slightly different output statements.
In addition, C language and C have similar basic data types, such as integer, floating point, character, etc. The following is an example showing C language and C integer variables:
// Define an integer variable in C language
#include <stdio.h>
int main() {
int num = 10;
printf("The number is: %d
", num);
return 0;
}// Define an integer variable in C
#include <iostream>
int main() {
int num = 10;
std::cout << "The number is: " << num << std::endl;
return 0;
}In the above example, we can see that both C language and C define an integer variable num and output its value.
In addition, the function definition and calling methods in C language and C are also very similar. The following is an example showing function parameter passing:
// Define a function that accepts parameters in C language
#include <stdio.h>
void printNumber(int num) {
printf("The number is: %d
", num);
}
int main() {
int number = 20;
printNumber(number);
return 0;
}// Define a function in C that accepts parameters
#include <iostream>
void printNumber(int num) {
std::cout << "The number is: " << num << std::endl;
}
int main() {
int number = 20;
printNumber(number);
return 0;
}In the above example, we have shown how to define a function that accepts parameters and call it in C language and C.
Finally, C is an object-oriented programming language developed on the basis of the C language. Therefore, C also includes object-oriented programming features such as classes, objects, inheritance, and polymorphism. Here is an example showing a C class:
// Define a simple class in C
#include <iostream>
class Person {
public:
std::string name;
int age;
void displayInfo() {
std::cout << "Name: " << name << ", Age: " << age << std::endl;
}
};
int main() {
Person p1;
p1.name = "Alice";
p1.age = 25;
p1.displayInfo();
return 0;
}In the above example, we defined a simple Person class and created a Person objectp1, and finally called The displayInfo function outputs information.
In general, although the C language and C have some differences, they are still very similar in many ways, which makes it easier for developers who learn and use both programming languages to switch and adapt. Hopefully the code examples provided in this article will help readers better understand the similarities between the C language and C.
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