IODAY1

fgets读取行数

 

 

​
#include 
#include 
#include 

int main(int argc, const char *argv[])
{
	//判断文件个数是否为2
	if(argc != 2)
	{
		printf("input file error\n");
		printf("usage:./a.out fileName\n");
		return -1;
	}
	//定义文件指针
	FILE *fp;
	if ((fp = fopen(argv[1],"r")) == NULL)
	{
		perror("fopen error");
		return -1;
	}
	int count = 0;
	char s[2000];
	while (fgets(s,sizeof(s),fp) != NULL)
	{
		count++;
	}
	fclose(fp);
	printf("count = %d\n",count);

	return 0;
}

​

fgets和fputs实现拷贝

 

#include 
#include 
#include 

int main(int argc, const char *argv[])
{

	//定义文件指针
	FILE *srcfp;
	FILE *destfp;
	//以只读形式打开文件
	if((srcfp = fopen("./01open.c","r")) == NULL)
	{
		perror("fopen error");
		return -1;
	}
	//以只写形式打开文件
	if((destfp = fopen("./dest.txt","w")) == NULL)
	{
		perror("fopen error");
		return -1;
	}
	//定义一个容器
	char s[200];
	//循环读取数据
	while(fgets(s,sizeof(s),srcfp) != NULL)
	{
	//读取的数据放在第二个文件中
		fputs(s,destfp);
	}
	//关闭文件
	fclose(srcfp);
	fclose(destfp);

	return 0;
}