UMBC CMSC201, Computer Science I, Fall 1994 Section 0101, 0102 and Honors

Midterm Exam, version 1, Short Answer Section

Short Answers, 4 points each

1. What is the output of the following code fragment?

       int i, j ;
       
       for (i = 1 ; i <= 3 ; i++) {
          for (j = 1 ; j <= 5 ; j++) {
             if ( 2 * i + j  <= 7) {
                printf("+") ;
             } else {
                printf("o") ;
             }
          }
          printf("\n") ;
       }
     

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2. Write down the output of this program. Show your work and clearly indicate your final answer.

       #include <stdio.h>
       #include "genlib.h"
       #include "simpio.h"
       
       int deep(int, int) ;
       int space(int) ;
       
       main() {
          int a = 1, b = 2, c = 3 ;
          
          a = deep(b + 5, c) ;
          b = space(c) ;
          printf("main: a = %d, b = %d, c= %d\n", a, b , c) ;
       }
       
       int deep (int x, int y) {
          int z ;
          
          z = x - y ;
          printf("deep: x = %d, y = %d, z = %d\n", x, y, z) ;
          return(z) ;
       }
       
       int space (int c) {
          int a, b ;
          
          a = 1 ;
          b = c * 2 + a ;
          a = b + 5 ;
          c = deep(a, b) ;
          printf("space: a = %d, b = %d, c = %d\n", a, b, c) ;     
          return(b) ;
       }
   
     

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3. Write a simple program with a for loop that asks the user for an integer n and prints out the sum of the odd numbers from 1 to n. (For example: if the user enters 10, then your program should output 25, because 1 + 3 + 5 + 7 + 9} is 25.

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4. Write a program that prints out a large plus sign using the + character. Your program should accept an integer n from the user, and print out a plus sign that has n +'s in each arm. The following are sample outputs of the program. User enters 3:

      +
      +
      +
   +++++++
      +
      +
      +
   

   User enters 5:

        +
        +
        +
        +
        +
   +++++++++++
        +
        +
        +
        +
        +
   

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