Write a program to read series of names, one per line, from standard input and write these names spelled in reverse order to the standard output using i/o redirection and pipes. Repeat the exercise using an input file specified by the user instead of the standard input and using an output file specified by the user instead of the standard output.
Answers
please explain This question for shortly
Answer:
nt main(void){
char name[25];
int choice, n, i, j, len=0;
cout<<"1. Console I/O \n2. File I/O \n";
cout<<"Enter your choice:\n";
cin>>choice;
switch(choice){
case 1:
cout<<"Enter the number of students: \n";
cin>>n;
strcpy(fname1, "st.txt"); // use st.txt as the file name to read the names, inorder to reverse them and then to append them back to file 2 with file name of your own choice.
f1.open(fname1, ios::out);
for(i=1; i<=n; i++){
cout<<"Enter "<< i <<" student name: \n";
cin>>rec[i].name;
strcpy(name, rec[i].name);
f1<<name<<"\n";
len = strlen(name);
cout<<"Reversed Name is : ";
for(j=len-1; j>=0; j--){
cout<<name[j];
}
cout<<"\n";
}
f1.close();
break;
case 2:
cout<<"Enter the file name, from which you want to read the names:\n";
cin>>fname1;
cout<<"Enter the file name, from which you want to write the reversed names.\n";
cin>>fname2;
f1.open(fname1, ios::in);
f2.open(fname2, ios::out);
if(!f1 || !f2){
cout<<"Unable to open the file.\n";
break;
}
while(1){
f1.getline(name, 25);
if(f1.fail()){
break;
}
len = strlen(name);
for(j=len-1; j>=0; j--){
f2<<name[j];
cout<<name[j];
}
f2<<"\n";
cout<<"\n";
}
f1.close();
f2.close();
break;
default: cout<<"Invalid Entry";
Explanation: