Linux文件编程之fputc，fgetc，feof函数的使用

通过一个例子来熟悉使用三个函数

int fputc(int c, FILE *stream);

#include
#include

int main()
{
        FILE *fp;
        int i;
        char *str="I Love you the way you are!n";
        fp=fopen("./test.txt","w+");
        int len=strlen(str);
        for(i=0;i 
fgetc与feof函数原型 
int fgetc(FILE *stream);
 
int feof(FILE *stream);
 
#include
#include

int main()
{
        FILE *fp;
        char c;
        fp = fopen("./test.txt","r");
		//当feof的返回值为非0值说明到达文件末尾了
        while(!feof(fp))
        {
                c = fgetc(fp);
                printf("%c",c);
        }
        fclose(fp);
        return 0;

}
 
补充：写结构体数组到文件中 
#include
#include
#include
#include
#include
#include

struct Test
{
        int a;
        char c;
};

int main()
{
        FILE *fp;
        struct Test data[2]={{100,'a'},{101,'c'}};
        struct Test data2[2];
        fp=fopen("./file1","w+");
        int n_write=fwrite(&data,sizeof(struct Test)*2,1,fp);
        fseek(fp,0,SEEK_SET);

        int n_read=fread(&data2,sizeof(struct Test)*2,1,fp);
        printf("read %d,%cn",data2[0].a,data[0].c);
        printf("read %d,%cn",data2[1].a,data[1].c);
        fclose(fp);
        
        return 0;
 }