NetId: ____________________________      Section: _____________  
 
 

Print out this page and fill in the blanks to answer the following questions. Hand in this assignment at the beginning of Lab 10. As with all prelabs/labs, if you are not sure of the answer you may go to any EWS lab on campus and check your results by using the gcc compiler, or you can ask anyone of the CS101 staff for help.

1. Write the output of the following code:
   

   #include <stdio.h>
   
   void main(void){
     int i,j;
      int temp;
      int x[3] = { 3, 4, 1};
   
      /* bubbles(smaller values) float up(move to the beginning of the array) */
      for(j=3; j > 1; j=j-1)
        for(i=0; i < j-1; i=i+1) 
           if(x[i] > x[i+1])
   	{
              /* swap */
              temp = x[i];
              x[i] = x[i+1];
              x[i+1] = temp;
           }
   
   
      for(i=0; i< 3; i=i+1)   
         printf("%i ",x[i]); 
      
      printf("\n");
   }  
       
   
   
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2. The following program compiles and runs without errors. Write the output the program produces.

	#include <stdio.h>
	void main(void)
	{
  	  char string1[] = {'H','e','l','l','o','\n'};
   	  char string2[] = "Hello";    
  	  int result = strcmp(string1,string2);

  	  if (result == 0) 
     	     printf("Equal!");
  	  else 
     	     printf("Not equal!");
  	  printf("\n");

  	 if( strcmp("Hello", string2) == 0)
            printf("Equal!");
  	 else
           printf("Not equal!");
         printf("\n");
	}

3. Suppose you have an integer array scores[40] that already contains the exam scores for 40 students. Complete the following code to compute the average score, and store it in the variable average. (Don't use integer division to calculate the average).

int i,total = 0;
int scores[40];
double average;

/* some code not shown here that assigns values to the scores array */

for(i=0; _____________________;  ____________________ ) {



    ______________________________________;

}

average = __________________________________;

4. Given an array exactly as in the previous question. Complete the following code to find the lowest score. The variable min is an integer.

min = scores[0];

for(i=1; ___________________;  ________________________ ) {



  if ( ___________________   scores[i] )



        min = ____________________________;
}
printf("The lowest score is %i.\n",min);

5. Complete the following program that prompts a user for her first name and then reads the name and responds with a personal greeting.
   For example:
   Enter your first name: Sue
   Hello Sue !
   

   #include <stdio.h>
   void main(void)
   {
       char fname[72];
       char greeting[132];
       printf("Enter your first name: ");
       
   
       scanf("%s", ________________________________);
   
   
       strcpy(greeting , "Hello ");
   
   
       strcat(greeting , _______________________________________);
   
   
       strcat(greeting , " !");
   
       printf(" %s \n", greeting);
   
   }
       

6. Write the output the following program produces when run. See lecture 15-21.
   

   #include <stdio.h>
   
   void main(void) 
   {
      char password[32] = "CS101";
      char course[32] = {'C','S','1','\0','5'};
      printf("%s \n", password);
      printf("%s \n", course);
      printf("%c \n",password[1]);
      strcpy(password, course);
      printf("%s \n", password);
      if (strcmp( password, "CS101")  > 0)
         printf("yes \n");
      else
         printf("no \n");
   }

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