引言C语言作为一种历史悠久且功能强大的编程语言,至今仍广泛应用于操作系统、嵌入式系统、游戏开发等领域。对于想要踏入编程世界的新手来说,掌握C语言是一项基础而重要的技能。本文将为您提供一份从入门到实战的...
C语言作为一种历史悠久且功能强大的编程语言,至今仍广泛应用于操作系统、嵌入式系统、游戏开发等领域。对于想要踏入编程世界的新手来说,掌握C语言是一项基础而重要的技能。本文将为您提供一份从入门到实战的C语言生存指南,帮助您轻松驾驭编程世界。
C语言由Dennis Ritchie于1972年发明,最初用于编写操作系统Unix。它具有高效、灵活、可移植等特点,是学习其他编程语言的基础。
函数是C语言的核心,用于实现代码的模块化。
指针是C语言的灵魂,用于实现内存操作。
结构体用于将不同类型的数据组合在一起。
#include
int main() { float num1, num2, result; char operator; printf("Enter an operator (+, -, *, /): "); scanf("%c", &operator); printf("Enter two operands: "); scanf("%f %f", &num1, &num2); switch (operator) { case '+': result = num1 + num2; break; case '-': result = num1 - num2; break; case '*': result = num1 * num2; break; case '/': if (num2 != 0) result = num1 / num2; else printf("Error! Division by zero."); break; default: printf("Error! Invalid operator."); } printf("Result: %.2f", result); return 0;
} #include
#include
typedef struct { char title[50]; char author[50]; int year;
} Book;
Book *books = NULL;
int book_count = 0;
void add_book(const char *title, const char *author, int year) { books = realloc(books, (book_count + 1) * sizeof(Book)); books[book_count].title = strdup(title); books[book_count].author = strdup(author); books[book_count].year = year; book_count++;
}
void delete_book(int index) { if (index >= 0 && index < book_count) { free(books[index].title); free(books[index].author); for (int i = index; i < book_count - 1; i++) { books[i] = books[i + 1]; } books = realloc(books, (book_count - 1) * sizeof(Book)); book_count--; }
}
void find_book(const char *title) { for (int i = 0; i < book_count; i++) { if (strcmp(books[i].title, title) == 0) { printf("Book found: %s by %s, published in %d\n", books[i].title, books[i].author, books[i].year); return; } } printf("Book not found.\n");
}
void display_books() { for (int i = 0; i < book_count; i++) { printf("%d. %s by %s, published in %d\n", i + 1, books[i].title, books[i].author, books[i].year); }
}
int main() { add_book("The C Programming Language", "Kernighan and Ritchie", 1978); add_book("Clean Code", "Robert C. Martin", 2008); display_books(); find_book("The C Programming Language"); delete_book(1); display_books(); return 0;
} 通过本文的介绍,相信您已经对C语言有了初步的了解。掌握C语言需要不断学习和实践,希望这份生存指南能帮助您在编程世界中轻松驾驭。祝您学习愉快!