C++ Primer学习笔记二

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vector<int>   a(10,0);

for(vector<int>::iterator itor=a.begin();itor!=a.end();itor++)

    *itor=1;

 

/* *itor can't changed */

for(vector<int>::const_iterator itor=a.begin();itor!=a.end();itor++)

    cout<<*itor;

/* itor itself can't changed,but *itor is changeable */

const vector<int>::iterator itor;

 

bool singal;

cin>>singal;

　　计算数组长度

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unsigned a[]={1,2,3,4,5,6,7,8,9,0};

cout<<sizeof(a)/sizeof(unsigned);