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#include <iostream>
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using namespace std;
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// Variable declaration:
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extern int a,b;
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extern int c;
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extern float f;
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int main(){
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//Variable defination:
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int a,b;
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int c;
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float f;
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//actual initialization
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a=10;
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b=20;
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c= a + b;
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cout << c << endl ;
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f=70.0/3.0;
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cout << f << endl;
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return 0;
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}
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