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vectors v/s arrays

 
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vectors v/s arrays
prads
16 Mar, 2008 - 11:27 PM
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hello,
does using vectors instead of arrays reduce the execution time when running through huge loops?
For eg say i have an array A[38000] whose value changes within a loop that again runs 30000 times.......

CODE

int A[38000];
for(int i=0;i<30000;i++)
A[i]=X[i]*Y[i];
B[i]=A[i]*X[i];
//more statements which changes A[i];
//the above statements are just an example and not what i actually have;


Which one is advisable?
Thanks,
prads
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nirvanarupali
RE: Vectors V/s Arrays
17 Mar, 2008 - 12:01 AM
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Few things about standard vector.


1. Reading into a standard vector guarantees that you don't overflow some arbitrary buffer.
2. A vector knows its size, so you don't have to count elements. ( The size increases everytime you
add elements.)

For more info: read the C++ Programming Language 3rd Ed

Arrays are fixed. You cannot change its size at run-time.
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