暨南大學(xué)C語言樣題

1、I.True/False第1 頁共6 頁1. ( F)Identifiers consist of letters and digits in any order, but must be in lowercase.2. (T)We create modular programs because they are easier to develop, correct and modify.3. (F)All computers use twice the amount of storage for double precision than floating point data type4.

2、 (F)Static variable is not created and destroyed each time the function is called, it is the default storage class used by C.5. (T)A compound statement may be used anywhere in C program in place of a single statement.6. (F)In C language, all operators are binary operator which connecting tow operand

3、s side-by-side.7. (T)The Escape Sequence is a combinations of a backslash () and a character that tells the compiles to escape from the ways these character would be normally interpreted8. (T)Extern storage class is to extend the scope of a global variable beyond its normal boundary-file. it does no

4、t cause the creation of a new variable.9. (F)After defined, the symbolic names can be used in any statement and the program can change the value of the symbolic names.10. (T)The mistake of u sing the assignment operator” =” in place of the relationaloperator ”=” results in ainvalid C expressionII. C

5、hoice11. (C)For the algebraic expression 3ae/bc, which of the following C expression is invalidA) a/b/c*e*3B) 3*a*e/b/cC) 3*a*e/b*cD) a*e/c/b*312. (D)For the declarations: char w; int x; float y; double z; the data type of the value of w*x+z-y isA) floatB) charC) intD) double13. (B)For following dec

6、laration, which expression will not result in 3 ? int x10 = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, *p1 ;A) x3B) p1 = x +3, *p1+C) p1 = x +2, *( p1+ )D) p1 = x +2, *+p114. (A)Which one is not endless loop?A) for (y = 0, x = 1 ; x > +y ; x = i+ ) i = x ;B) for ( ; ; x + = i ) ;C) while (1) x +;D) for ( i =1

7、0 ; ; i-) sum += i ;15. (B)The result of the following program ismain() int a = -2, bdo b = +a;if (!b) printf( “#”);else printf( “* ”);while(a<1)A#*#B *#*C)#D) *16. (D)Which one of the following functions is valid ?A) double fun ( int x , int y ) z = x + y ; return z ;B) fun ( int x , y ) int z ;

8、return z ;C) fun ( x , y ) int x ,y ; double z ;z = x + y ; return z ;D) double fun ( int x , int y ) double z ;z = x + y ; return z ;17. (D)In a source codes file of C language, if a variable can only be used by all functions with the file itself, the storage class of the variable is A) externB) re

9、gisterC) autoD) static18. (B)The C programming language the symbol “= = ” isA) rational operatorB) logical operatorC) conditional operatorD) assignment operator19. (D)For the definition statement: double s = 123.5; , which one is the correct output statement?A) printf( “s=%d ”,s);B) printf(“s=%ld ”,

10、 s);C) printf( “s=%f ”, s);D) printf(“s=%lf ”,s);20. ( C)Which of the following expressions will result in 0?A) 3%5B) 3/5.0C) 3>5D) 3<5III. Fill in the blanks in each program to implement the purpose according to the descriptionDescription#1: The following program can accept elements of an arr

11、ay from the keyboard, andfind the maximum element and corresponding index in the array. mai n() int x10, *p1, *p2, k;for(k = 0; k < 10; k+) scanf("%d", x+k); for(p1 = x, p2 = x; p1-x < 10; p1+ )if(*p1 > * p2) p2 =【21 】prin tf("MAX = %d, INDEX = %dn", *p2,21. A) pl22. A)

12、p1 -xB) p2p1B) p1C) xp2C) p2 -x【22】);D) x -p1D) x -p2Description#2: For each x, the program will calculate a corresponding y according to thexy2 < x <= 10x(x+2)-1 < x <= 22xx <= -1x - 1relati on ship of x and y illustrated in the followi ng table.mai n() int x, y;scanf(%d”，&x);if(

13、 【23 】)y = x * (x + 2); else if(【24 】)y = 2 * x;else if(x <= -1) y = x - 1;else 【25】;if(y != -1) pri ntf("%d", y); else prin tf("error");23. A) x > 2 | x <= 10C) x < 2 && x <= 1024. A) x < -1 | x >= 2C) x > -1 && x <= 225. A) y = -1B) y

14、= 0B) x > 2 && x <= 10D) x < 2 | x >= 10B) x > -1 | x <= 2D) x > -1 A A x <= 2C) x = 0 D) x = -1IV. (1)What is the purpose of the followi ng program?#in clude<stdio.h>#define N 10main ()int t, i, j, aN+1;printf('please in put 10 in tegers:”);for (i=1; i<=

15、N; i+)scanf(%d", &ai);第7頁共6頁printf(“n ”);for (i=1; i<=N-1; i+) for (j=1; j<=N-i; j+)if (aj<aj+1)t=aj+1; aj+1=aj; aj=t;for (i=1; i<=N; i+) printf(“%d”, ai);printf(“ ”n);從大到小排列數(shù)字。(2)Read the grogram and guess the result of the program#include <stdio.h>int k = 1;char a = int

16、fuc();IBM computer ”, b =C program ”main() int p = 3;while (putchar(ak) k+; /*k=12*/ putchar( n ');printf(“k=%d, ”, k);k=fuc(p);printf(“%d, %dn ”, p,k);printf(“%c%sn ”, a0, &bp);puts(&a3);int fuc(int m)int k = 0;while (putchar(bk) k+; printf("k=%dn", k);k +=m; m *=k;printf(&quo

17、t;%d, %dn", m, k);return (m+k);OUTPUT:BM computer k=12,C program k=936, 123, 48Irogram computerV. Check Error in the program according to the following description and correct them, write the whole corrected program on the an swer sheetA programmer wants to write a program to simulate a roll of

18、 the dice. The programmer decides to have the program choose two pseudo-ra ndom nu mbers from 1 to 6 and output the two nu mbers. If two values are the same, the program should also output the stri ng "That's a pair!" after printing the two values.The programmer writes the followi ng c

19、ode:#in clude <stdio.h>#in clude <stdlib.h>#in clude <time.h> int mai n(void) int dice2;sran d(time(NULL);for (x = 0; x <= 2; x+);dice x = ran d() % 6;printf ("You rolled a %d and a %d.n", dice0, dice1); if (dice0 = dice1)prin tf("That's a pair!n");return

20、 0;The above code has 5 errors in it! What are they?沒有定義x/*超纟岡*/for (x = 0; x <= 2; x+);應(yīng)改為 for (x = 0; x <= 2; x+) dicex = rand() % 6; 應(yīng)改為(dicex = rand() % 7) +1for (x = 0; x <= 2; x+);應(yīng)改為 x < 2if (dice0 = dice1)應(yīng)改為=VI. Writing a programWrite a complete program that allows the user to e

21、nter a string (assumed to be less than 25 characters long). If N is the length of the string, the program should output N rows to standard output. The first row should be the string entered by the user.The second row should be thestring without its last character. The third row should be the string without its last two characters. Etc. The Nth and final row should be only