6.20 作业

1>使用fgets完成统计文件行号

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(int argc,const char *argv[])
{
	FILE *fp = NULL;
	if((fp = fopen(argv[1],"r")) == NULL)
	{
		perror("fopen errpr");
		return -1;
	}
	
	char a[20];
	int count=0;
	while(fgets(a,sizeof(a),fp)!=NULL)
	{
		if(strchr(a,'\n')!=NULL)
			count++;
	}
	printf("行数:%d\n",count);
	fclose(fp);

	return 0;
}

2>使用fgets、fputs实现两个文件拷贝

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(int argc,const char *argv[])
{
	FILE *fp1 = NULL,*fp2 = NULL;//fp1为源文件 fp2为目标文件
	const char *file1 = argv[1];
	const char *file2 = argv[2];
	if((fp1 = fopen(argv[1],"r")) == NULL)
	{
		perror("f1 error");
		return -1;
	}
	if((fp2 = fopen(argv[2],"w")) == NULL)
	{
		perror("f2 error");
		return -1;
	}
	char a[20];
	while(fgets(a,sizeof(a),fp1)!=NULL)
	{
		fputs(a,fp2);
	}
	fclose(fp1);
	fclose(fp2);
	return 0;
}