4.5.1 Why bother with functions?

wzxfirst

于 2011-01-05 22:53:00 发布

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TRY THIS

Implement square() without using the multiplication operator; that is, do the x*x by repeated addition(start a variable result at 0 and add x to it x times). Then run some version of "the first program" using that square().

#include "std_lib_facilities.h" int square(int x) { int result = 0; for(int loop = 0; loop < x; ++loop) result += x; return result; } int main() { int xx = 0; cin >> xx; cout << square(xx); }

#include "std_lib_facilities.h" int square(int); int main() { int xx = 0; cin >> xx; cout << square(xx); } int square(int x) { int result = 0; for(int loop = 0; loop < x; ++loop) result += x; return result; }