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下列程序的运行结果是-1。#includeusing namespace std;int f(int x,int y){ int c; if (（1)______)c = 1; else if (（2))c = 0; elsec = -1; return c;}void main(){ int i = 2, j = 3; int p = f((3)); cout << p << endl;}

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下列程序的输出结果如下：x, y=10,26x, y=10,26x, y=11,25请将程序填充完整#include < iostream>using namespace std;void f2((1)____){ int z = x; x = y; y = z;}void main( ){ int x = 10, y = 26; cout << "x, y=" << x << "," << y << endl; f2(x,y); cout << "x, y=" << x << "," << y << endl; x++; y--; f2(x,y); cout << "x, y=" << x << "," << y << endl;}

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下列程序的输出结果如下：x, y=10,26x, y=26,10x, y=9,27请将程序填充完整#include < iostream>using namespace std;void f2(（1）________){ int z = x; x = y; y = z;}void main(){ int x = 10, y = 26; cout << "x, y=" << x << "," << y << endl; f2(x,y); cout << "x, y=" << x << "," << y << endl; x++; y--; f2(x,y); cout << "x, y=" << x << "," << y << endl;}

阅读下列程序,并写出输出结果。#includeusing namespace std;int f(int);void main(){ int i; for (i = 0; i<3; i++)cout << f(i) << ","; cout << endl;}int f(int a){ int b = 0; static int c = 3; b++; c++; return(a + b + c);}