CS计算机代考程序代写 //solution 2: start writing at end

//solution 2: start writing at end

#include
#include
#include

int main(int argc, char *argv[]){
int fd1, fd2;
char buffer; // 1 character buffer
long int i=0, fileSize=0;

fd1=open(argv[1], O_RDONLY);
fd2=open(argv[2], O_CREAT|O_WRONLY|O_TRUNC, 0755);

while(read(fd1, &buffer, 1)>0)
fileSize++;
lseek(fd2, fileSize-1, SEEK_SET);//pointer to end
lseek(fd1, 0, SEEK_SET);

while(++i <= fileSize){ read(fd1, &buffer, 1); lseek(fd2, -i, SEEK_END); write(fd2, &buffer, 1); } close(fd1); close(fd2); }