三、阅读程序

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#include <iostream>
using namespace std;
int main(){
      int a,b,c;
      a = 1; b = 2; c = 3;
    if (a>b){
       if (a>c)
       cout << a <<' ';
  else
     cout << b << ' ';
   }
    cout << c << endl;
return 0;
}

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#include <iostream>
using namespace std;
struct point{
int x;
int y;
};
int main()
{
struct EX{
int a;
int b;
point c;
}e;
e.a = 1;
e.b = 2;
e.c.x = e.a + e.b;
e.c.y = e.a * e.b;
cout << e.c.x << ',' << e.c.y << endl;
return 0;
}

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#include <iostream>
#include <string> 
using namespace std;

int main()
{
	string str;
	int i;
	int count; count = 0;
	getline( cin, str );
	for ( i = 0; i < str.length(); i++ )
		if ( str[i] >= 'a' && str[i] <= 'z' )
			count++;
	cout << "It has " << count << " lowercases" << endl; return(0);

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#include <iostream>
#include <string>
using namespace std;

void fun( char *a, char *b )
{
  a = b;
  (*a)++;
}


int main()
{
  char c1, c2, *p1, *p2;
  c1 = 'A';
  c2 = 'a';
  p1 = &c1;
  p2 = &c2;
  fun( p1, p2 );
  cout << c1 << c2 << endl;
  return(0);
}