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04-26-2008, 08:32 AM
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| char data type i am going to develop a program will read data from a file that contains #s, simple spaces, digits and new line characters. in the program i am going to use while ((ch = getchar()) != EOF). when i declare the ch, it must be in type char or i can use type int? due to the digits part eventually i need to store them into 2-d array and use them as a number for operation. please advise what is the best and simple way to get on. thanks in advance. __________________           |
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04-27-2008, 02:57 AM
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| See if you understand this example: Code: // io/read-file-sum.cpp - Read integers from file and print sum.
// Fred Swartz 2003-08-20
#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;
int main() {
int sum = 0;
int x;
ifstream inFile;
inFile.open("test.txt");
if (!inFile) {
cout << "Unable to open file";
exit(1); // terminate with error
}
while (inFile >> x) {
sum = sum + x;
}
inFile.close();
cout << "Sum = " << sum << endl;
return 0;
} __________________ PHP Code: |
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04-27-2008, 03:41 AM
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| well, the code was trying to open a file called test.txt. if it opens successfully, then it copies all the contents from the file to the variable x. variable sum then holds the number of character being copied and display the number of characters. the sum and x variable declare as type int, but in the file test.txt does it contain all kinds of character? that means i can declare variable ch as type int, according to my question above, if you output to type int variable, it can also work for input to type int variable. am i correct? but as i mentioned my test.txt apart from digit numbers, it has '#' character, simple spaces and new line character. as type int variable still can work with these characters is that right? __________________ |
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