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1cookie · Mar 22nd, 2008, 1:25 PM

hi

Write a c++ program, which uses File Input/Output and performs all of the following tasks;

a. reads 10 numbers {1; 2; 4.5; 2.5*10^10; -3; 0.5; 8*10^-10; -10;3.5} from one file.

b. reads another 5 numbers: {5*10^-6; 2; -7; 4.5; 5*10^5} from another file.

c. calculates the product of all 15 numbers and writes result to the screen and to a third file.

my code at the moment is:

 c++ Syntax (Toggle Plain Text) 
 
int main(){ 
 
float r[10], prod; 
fstream file_in; 
 
file_in.open("C:\\Users\\Cookson\\Desktop\\file1.txt",ios::in); 
 
int i =0; 
while(!file_in.eof()) 
{ 
file_in >> r[i];
 cout<<r[i]<<endl; 
i++; 
} 
 
 
}
int main(){ 

float r[10], prod; 
fstream file_in; 

file_in.open("C:\\Users\\Cookson\\Desktop\\file1.txt",ios::in); 

int i =0; 
while(!file_in.eof()) 
{ 
file_in >> r[i];
 cout<<r[i]<<endl; 
i++; 
} 


}

I have a file named: 'file1.txt' on my desktop, it has the first ten values in it (as above!).

When i compile and run the program, sure enough it reads the ten numbers into my array r[]. But instead of displaying ten numbers to the screen i get 11, I get an extra number that i don't want namely: 1.4013e-044!!

Why is this number appearing and for what reason??

help please.

I have a file named: 'file1.txt' on my desktop, it has the fist ten values in it (as above!).

When i compile and run the program, sure enough it reads the ten numbers into my array r[]. But instead of displaying ten numbers to the screen i get an extra number that i don't want namely: 1.4013e-044!!

Why is this number appearing and for what reason??

Mar 22nd, 2008, 1:25 PM	#1
1cookie Newbie Join Date: Mar 2008 Posts: 2 Rep Power: 0	file IO hi Write a c++ program, which uses File Input/Output and performs all of the following tasks; a. reads 10 numbers {1; 2; 4.5; 2.510^10; -3; 0.5; 810^-10; -10;3.5} from one file. b. reads another 5 numbers: {510^-6; 2; -7; 4.5; 510^5} from another file. c. calculates the product of all 15 numbers and writes result to the screen and to a third file. my code at the moment is: c++ Syntax (Toggle Plain Text) int main(){ float r[10], prod; fstream file_in; file_in.open("C:\\Users\\Cookson\\Desktop\\file1.txt",ios::in); int i =0; while(!file_in.eof()) { file_in >> r[i]; cout<<r[i]<<endl; i++; } } int main(){ float r[10], prod; fstream file_in; file_in.open("C:\\Users\\Cookson\\Desktop\\file1.txt",ios::in); int i =0; while(!file_in.eof()) { file_in >> r[i]; cout<<r[i]<<endl; i++; } } I have a file named: 'file1.txt' on my desktop, it has the first ten values in it (as above!). When i compile and run the program, sure enough it reads the ten numbers into my array r[]. But instead of displaying ten numbers to the screen i get 11, I get an extra number that i don't want namely: 1.4013e-044!! Why is this number appearing and for what reason?? help please. I have a file named: 'file1.txt' on my desktop, it has the fist ten values in it (as above!). When i compile and run the program, sure enough it reads the ten numbers into my array r[]. But instead of displaying ten numbers to the screen i get an extra number that i don't want namely: 1.4013e-044!! Why is this number appearing and for what reason??