C言语作为一种基本的、构造化的编程言语,广泛利用于体系编程、软件开辟、嵌入式体系等范畴。控制C言语对进修其他编程言语跟从事打算机相干行业存在重要意思。本文将结合苏小红教师的《C言语顺序计划》等讲义,为大年夜家供给一份具体的C言语入门攻略,帮助大年夜家轻松控制编程技能。
int age = 18;
float score = 88.5;
char grade = 'A';
int a = 10, b = 5;
int result = a + b; // result = 15
int comparison = a > b; // comparison = 1
int logical = (a > b) && (b < 10); // logical = 1
// if-else语句
if (a > b) {
printf("a is greater than b");
} else {
printf("a is less than or equal to b");
}
// for轮回
for (int i = 0; i < 10; i++) {
printf("%d ", i);
}
void printMessage() {
printf("Hello, world!");
}
int main() {
printMessage();
return 0;
}
int a = 10;
int *ptr = &a; // ptr指向变量a的地点
printf("Value of a: %d", *ptr); // 输出变量a的值
int arr[5] = {1, 2, 3, 4, 5};
printf("First element of arr: %d", arr[0]);
char str[] = "Hello, world!";
printf("%s", str);
struct Student {
char name[50];
int age;
float score;
};
struct Student stu1;
strcpy(stu1.name, "Alice");
stu1.age = 20;
stu1.score = 88.5;
printf("Name: %s, Age: %d, Score: %.2f", stu1.name, stu1.age, stu1.score);
union Data {
int i;
float f;
char c;
};
union Data data;
data.i = 10;
printf("Integer value: %d", data.i);
data.f = 3.14;
printf("Float value: %.2f", data.f);
#include <stdio.h>
int main() {
FILE *fp;
char str[100];
// 打开文件
fp = fopen("example.txt", "r");
if (fp == NULL) {
printf("File cannot be opened.\n");
return 1;
}
// 读取文件内容
while (fgets(str, sizeof(str), fp)) {
printf("%s", str);
}
// 封闭文件
fclose(fp);
return 0;
}
经由过程以上七个章节的讲解,信赖你曾经对C言语有了开端的懂得。进修C言语须要一直现实跟积聚,盼望这份入门攻略能帮助你轻松控制编程技能。祝你进修高兴!