100 codes are required to memorize C language

100 essential codes for C language: Print "Hello, world!" to define variables, including integers, floating point numbers and characters, using arithmetic operators to add, subtract, multiplication, division and other operations, etc., use comparison operators to judge size, etc., use logical operators to judge true or false, etc., use loop structures to perform repeated execution using array storage and access elements using pointers to access and modify the value of the variable. Use structure to store and access related data using function definition and call code blocks

100 codes required for C language

1. Hello World! Program

 <code class="c">#include <stdio.h> int main() { printf("Hello, world!\n"); return 0; }</stdio.h></code>

2. Variable definition

 <code class="c">int x = 10; float y = 3.14; char c = 'a';</code>

3. Arithmetic operators

 <code class="c">int sum = xy; int difference = x - y; int product = x * y; int quotient = x / y; int remainder = x % y;</code>

4. Comparison operator

 <code class="c">if (x > y) { // x大于y } else if (x </code>

5. Logical operators

 <code class="c">if (x && y) { // x和y都为真} else if (x || y) { // x或y为真} else { // x和y都为假}</code>

6. Loop

 <code class="c">for (int i = 0; i </code>

7. Array

 <code class="c">int arr[] = {1, 2, 3, 4, 5}; for (int i = 0; i </code>

8. Pointer

 <code class="c">int *ptr = &x; *ptr = 20; // 改变指向的值printf("x: %d, *ptr: %d\n", x, *ptr);</code>

9. Structure

 <code class="c">typedef struct { int x; float y; } Point; Point p = {10, 3.14}; printf("Point: (%d, %.2f)\n", px, py);</code>

10. Function

 <code class="c">int add(int a, int b) { return ab; } int main() { int sum = add(x, y); printf("Sum: %d\n", sum); }</code>

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