CSCI 160 in-class exercise

For each of the C++ programs shown below, write down exactly what you think the user would see as output if the program was executed. 
// Program 1
#include <cstdio>

int main()
{
   printf("Welcome to question 1");
   printf("\n");
   return 0;
}


















// Program 2
#include <cstdio>

int main()
{
   printf( "Welcome to question 2");
   printf( "\n");
   printf( "not much,");
   printf( "but more than question 1.");
   printf( "\n");
   printf( "Bye!");
   printf( "\n");
   return 0;
}













// Program 3
#include <cstdio>

int main()
{
   float Pi = 3.14;
   float radius = 4;
   float circumference = 2 * Pi * radius;
   printf( "Welcome to question 3\n");
   printf( "A circle of radius %f", radius);
   printf( " has circumference %f\n", circumference);
   return 0;
}