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Read integers from a text file with C++ ifstream
Here is an example of Read integers from a text file with C++ ifstream.
Example
#include <fstream> #include<iostream> using namespace std; int main() { //initialie the array size int arr[30]; ifstream is("a.txt"); int cnt= 0; int x; // check that array is not already full while (cnt < arr[30] && is >> x) // and read integer from file arr[cnt++] = x; // print the integers stored in the array cout<<"The integers are:"<<"\n"; for (int i = 0; i < cnt; i++) { cout << arr[i] <<' '; } //close the file is.close(); }
Output
The integers are: 1 2 3 4 5 6 7
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