hi guys i want to pass some strings and int values from a file to my program.. if i was using c i could do it like scanf(p,"%s %s %d %d",&str1,&str2,&num1,&num2); i dont want to get the whole line just the vallues one by one if i wanted the whole line i could do it with getline(); now that i want the values one by one how do i do it ...
thanx
something like thisCode:#include <iostream> #include <fstream> #include <string> using namespace std; int main () { string str1,str2; int p1,p2; ifstream myfile ("book.txt"); if (myfile.is_open()) { while ( myfile.good() ) { cout << "str1 : " << str1 << " str2 : " << str2 << " p1 : " << p1 << " p2: "<<p2<<endl; /* getline (myfile,line); cout << "line : " << line << endl; */ } myfile.close(); } else cout << "Unable to open file"; return 0; }
One option is to use formatted input with the overloaded operator>> such as:Originally Posted by wesdom
You have probably seen such code used with std::cin.Code:myfile >> str1 >> str2 >> num1 >> num2
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yes i have seen but i have a problem with both ways .... if i use myfile>>str1..... when i run my program it opens and close so i am thinking i should have done something wrong... and when i use cin>> it doesnt run it opens a black window and do nothing .... i have seen some examples on net i have written the code but it doesnt work.... btw my code is the one that i wrote plus myfile >>str1..... i just forgot to add it copy error
Run your program from a separate command prompt window.
That is because your program is waiting for you to enter the input.
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xmmm.... i am using code Blocks i dont know if it is possible to run it to a separate window... I will try to find some more information an i will post the answer
It certainly is, outside of Code Blocks. If you really want to run it within Code Blocks, then change the project preferences to get the program execution to pause at the end, or run it within a debugger with a breakpoint at the end, or insert extra code to read input at the end and hence get the program to wait for input.
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thanks very much you ve been very helpful
