Programming and Graphics

3.7 Formatted input and output 79

/*------loop over student grades----------------*/

while(file2 >> grade[i][j]) // read the grades

{

cout << setw(3) << right << grade[i][j] << " ";

j++;

}

cout << endl;

file2.clear(); // allow for more reads

i++;

}// end of loop over students

file2.close();

return 0;

}

An interesting feature of the code is the presence of two nestedwhile
loops of reads. When a false name-read is encountered, the outer loop is exited.
When a false grade-read is encountered, the inner loop is exited, and thecin
flag is cleared by issuing the command:

file2.clear();

to allow for additional name readings.

If the filegrades.datcontains the data:

Johnson Bob 8 10

Kerr Jean 9 10 9

Wang J-Y 8 10 9

then the output on the screen is:

1 Johnson Bob 8 10

2 Kerr Jean 9 10 9

3 Wang J-Y 8 10 9

Problems

3.7.1.Print the value ofRANDMAXset by your compiler.