"'"' .;, b) F or ( c = l ; c <= 10,"' c++ ) X { JJ. ~. Computer Programming I COME Midterm Examination. Fall November 2016

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1 Group B ~. Computer Programming I COME Midterm Examination B Fall November Identify and correct the errors in each of the following statements. (Note: There may be more than one error.) {10 points) vv a) /lhile ( i <= 100 >Xl tot =+ i; ++i; i.;, b) F or ( c = l ; c <= 10,"' c++ ) X { JJ printf ( "%d\n,,x e ) ; _i c) float x,y; ~ ~ printf(' Please enter two float number: )J scanf("%d",x,y) ~ s~ ('-/.fl/'j c,?c,t_:;) 1 printf ("Difference of the numbers is %ft", &x+&y); f ~ d) The following code should compare two variables mathematically: if ( x '= y )) printf ( "Number are different" \n 11 ); else!- pr in tf ( "Numbers are the same,. \nll ); 2. The sign is also known as the operator. a) +, assignment!!, 0' remainder c) equality d) * stream manipulator "'"' ' 3. The address operator is a) % If & d) && e)! 4. Which of the following is an equality operator? a) > b) = c) >= lfl == Page 1I4

2 Group B, Computer Programming I B COME I 03 - Midterm Examination Fall November Consider the following code, assuming that xis an integer variable with an initial value of 2: if ( x = 4 ) printf(" %d", x ); What is the output? a) 2 ~ 4 c) nothing d) a syntax error is produced 6. The sign is also. known as the l)f =, assignment b) * stream manipulator ' c) &, stream insertion d) +, assignment operator. 7. Which of the following is not a valid escape sequence?, a) \a b) \ \ \~ d) \II 8. Which of the following can not be used as variable in a C program? a) student4 b) final_exam c) pointlx df sec#2 e) rad_cm 9. What is wrong with the following while loop? While (tot <= 2500) tot = tot + 30; a) Braces are required around tot = tot +30;. b) There should be a semicolon after While ( tot <= 2500 ). ~ While should be while. d) The parenthesis should be braces. 10. How many times does the following program print hello? i = O; while ( i <= 10 ) { printf( "hello" ); i +=2; } a) c) 10 d) an infinite number of times Page 2 I 4 JL/.(,

3 Group B Computer Programming I B COME 103 -Midterm Examination Fall November If x = 5 which of the following sets x to 7? dfx += 2; b) x *= 2; c) x =+ 2; d}x + 2 = x; 12. What will be the output of the following programs when executed? {10 points) #incl ude <stdio.h> int main(void) { int i j size=5 for ( i = 1 ; i <=size ; i++) { // Beginning of i loop for ( j = 1 ; j <=i ; j ++) { printf ( "*" ) ; } printf ("\n"); } //End of i loop Terrni11cvl 0 JfJreturn O;} // End of Main ~ '*'* fr r * ~ * ~ '* 'fr *- r *'* 13. What will be the output of the following programs when executed? #include <stdio.h> int main( void ) { int a=4 ' b=b; printf( "%d\t"' a ) ; printf( "%d\n", ++a printf( "%d\t", a++ if ( b >= a ) b+=a; else b-=a; ) ; ) ; printf( "%d\n", --b ); printf ( "%d", b + a++ ) ; return 0;} //End of Main lj (10 points) Page 3 I 4

4 ' ~... G roup B Computer Programming I COME Midterm Examination ~OL~ '\\O~.S - B Fall November Write a complete C program that calculates the sum of the even number start ing from 2 to a desired positive integer number. Program inputs a positive integer number then prints the summation of the even positive integer numbers starting from 1 to the desired number to the screen. {15 points) Mathematically if the entered number n then your program must calculate n For example, if the entered number is 7 then your program will print 12 to the screen. The terminal output of the program is shown below when entered number is ~ Enter a Positive lntege~!'lumbe ~ : 7 Summation of even nu.mbers from 2 to"7 is 12...s:.~e. ~ Writ e a complete C program that reads an integer number from keyboard then determines if the entered number is "even" or "positive" number and writes this information to the screen. {15 points) Example terminal output of the program shown below for two different scenarios. Enter a number: 3 Entered number is odd. Enter a number: 8 Entered number is positive.. ' ' _ se...e Write a program that asks the user to enter a positive integer number. It prints integer numbers starting from N to the 1 then prints the integer numbers from 2 to N in triangular form as shown below. The terminal output should look as below when executed and entered number is 5. (20 points) Hint: You should use two consecutive double-repetition loops to accomplish this task, the first one is decreasing and the second one is increasing order. E ~;~; a-: ~~~l;l v; ; ~;~g~ r.. ~~ ~ b;~ s ~ ';/~' i. ' '. ~. }... '"' ' 4444 ' Page 4 I 4

5 1: / FAll COME103 Midterm Exam Solution 2: // Group B 3: // Question 14) Sum of Even Numbers 4: 5: #include <stdio.h> 6: int main(void){ 7: int n,i,sum=0; // i is the counter 8: printf("enter a positive integer number:"); 9: scanf("%d",&n); 10: // Looping through 2,4,6,... up to n 11: // Note that n will not be included if it is odd but can be even too. 12: for ( i = 2 ; i <=n ; i+=2 ) sum += i; 13: // Now printing the result to the screen 14: printf( "Summation of odd numbers from 2 to %d is %d.",n,sum ); 15: return 0;} // End of Main 16: // One may also answer this question by using while repetition statement 1:/ FAll COME103 Midterm Exam Solution 2: // Group B 3: // Question 15) Odd Even Question 4: 5: #include <stdio.h> 6: int main(void){ 7: int n ; 8: printf("enter a number:"); 9: scanf("%d",&n); 10: if (n %2 == 0) printf("entered number is even."); 11: else printf("entered number is odd."); 12: return 0;} // End of Main 13: // One may also answer this question by using two simple if statements 5/5

6 1: // FAll COME103 Midterm Exam Solution 2: // Group B 3: // Question 16) Double Triangular printing 4: 5: #include <stdio.h> 6: int main(void){ 7: int n,i,j; // i and j are to be used as counter 8: printf("enter a positive integer number:"); 9: scanf("%d",&n); 10: // First Printing the Upper triangle n to 1 11: for ( i = n ; i >= 1 ; i ) {// Looping from n to 1 backward 12: for ( j = 1 ; j <= i ; j++ ) { //printing i, i times 13: printf("%d",i); 14: } // End of j repetition 15: printf("\n"); //going to the next line 16: } // End of i repetition 17: 18: // Now Printing the Lower triangle 2 to n 19: for ( i = 2 ; i <= n ; i++ ) {// Looping from 2 to n forward 20: for ( j = 1 ; j <= i ; j++ ) { //printing i, i times 21: printf("%d",i); 22: } // End of j repetition 23: printf("\n"); //going to the next line 24: } // End of i repetition 25: 26: return 0;} // End of Main 27: // One may also answer this question by using while repetition statement 6/6