高级语言程序设计作业 12/02

• 2024高级语言程序设计：https://edu.cnblogs.com/campus/fzu/2024C
• 高级语言程序设计课程第五次作业：https://edu.cnblogs.com/campus/fzu/2024C/homework/13314
• 学号：102400215
• 姓名：胡加乘

1

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using namespace std;

int main()
{
	FILE* fp1, * fp2;
	fp1 = fopen("File1.in", "r");
	fp2 = fopen("File2.out", "w");
	while (!feof(fp1))
	{
		int c = fgetc(fp1);
		fputc(c, fp2);
	}

	fclose(fp1);
	fclose(fp2);
	return 0;
}

2

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using namespace std;

int main()
{
	FILE* fp1, * fp2;
	int count = 0;

	fp1 = fopen("File1.in", "r");
	while (!feof(fp1))
	{
		fgetc(fp1);
		count++;
	}

	fclose(fp1);

	cout << count - 1;  // 最后\0不算
	return 0;
}

3

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using namespace std;

int main()
{
	FILE* fp;

	fp = fopen("File1.in", "r");
	while (!feof(fp))
	{
		int c = fgetc(fp);
		cout << static_cast<char>(c);
	}

	fclose(fp);

	return 0;
}

4

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using namespace std;

int main()
{
	FILE* fp;
	fp = fopen("File1.in", "a");
	if (!fp)
		exit(0);

	fprintf(fp, "\nAppend a line...");
	fclose(fp);

	return 0;
}

5

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using namespace std;

#define BUF_SIZE 256
char buffer[BUF_SIZE];

int main()
{
	FILE* fp, * fp2;
	fp = fopen("File1.in", "r+");
	fp2 = fopen("File2.out", "w");
	if (!fp)
		exit(0);

	const char* predicate = "Grape\n";
	while (fgets(buffer, sizeof(buffer), fp))
	{
		if (!strcmp(buffer, predicate))
			continue;
		fputs(buffer, fp2);
	}

	fclose(fp);

	return 0;
}

6

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using namespace std;

#define BUF_SIZE 256
char buffer[BUF_SIZE];

int main()
{
	FILE* fp;
	fp = fopen("File1.in", "rb");
	if (!fp)
		exit(0);
	
	fseek(fp, 0, SEEK_END);
	long bytes = ftell(fp);

	cout << bytes << "bytes";
	fclose(fp);

	return 0;
}

7

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>

using namespace std;

#define BUF_SIZE 256
char buffer[BUF_SIZE];

int main()
{
	FILE* fp;
	fp = fopen("students.txt", "w+");
	if (!fp)
		exit(0);

	fprintf(fp, "%20s%15s%10s%10s%10s%10s\n", "Name", "Number", "Chinese", "Maths", "English", "Average");

	char name[20],
		number[10];
	int chinese,
		maths,
		english;
	while (fscanf(stdin, "%s %s %d %d %d", 
		name, &number, &chinese, &maths, &english) == 5)
	{
		float avg = (chinese + maths + english) / 3.0;
		fprintf(fp, "%20s%15s%10d%10d%10d%10.2f\n", name, number, chinese, maths, english, avg);
	}
	fclose(fp);

	return 0;
}