[C++][IO]读写二进制文件

1. 以二进制方式读写结构体

struct Student
{string name;string sex;int age;
}void write(string filePath, const struct Student* stu, int n)
{FILE *fp;int i;if((fp=fopen(filePath,"wb"))==NULL){printf("cant open the file");return;}for(i=0;i<n;i++){if(fwrite(&stu[i],sizeof(struct Student),1,fp)!=1)printf("file write error\n");}fclose(fp);
}void read(string filePath, const struct Student* stu, int n)
{FILE *fp;int i;if((fp=fopen(filePath,"rb"))==NULL){printf("cant open the file");return;}for(i=0;i<n;i++){if(fread(&stu[i],sizeof(struct Student),1,fp)!=1)printf("file read error\n");}fclose(fp);
}