大學C語言樣題

1、I. True/False1. ( 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. (F)Sta

2、tic 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 operands side

3、-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 not caus

4、e 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 using the assignment operator”=” in place of the relational operator”= =” results in a invalid C expressionII. Choice

5、 11. (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 declara

6、tion, 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 =10 ; ; i-)

7、sum += i ;15. (B)The result of the following program ismain() int a = -2, b do b = +a; if (!b) printf(“#”); else printf(“*”); while(a5D) 35III. Fill in the blanks in each program to implement the purpose according to the description Description#1:The following program can accept elements of an array

8、 from the keyboard, and find the maximum element and corresponding index in the array. main() int x10, *p1, *p2, k; for(k = 0; k 10; k+) scanf(%d, x+k); for(p1 = x, p2 = x; p1-x * p2) p2 = 【21】 ; printf(MAX = %d, INDEX = %dn, *p2,【22】);21. A) p1B) p2p1C) xp2D) x p122. A) p1 xB) p1C) p2 x D) x p2Desc

9、ription#2: For each x, the program will calculate a corresponding y according to the relationship of x and y illustrated in the following table.xy2 x = 10x(x+2)-1 x = 22xx = -1x - 1main() int x, y; scanf(“%d”, &x); if(【23】 ) y = x * (x + 2); else if(【24】 ) y = 2 * x; else if(x 2 | | x 2 & x = 10C) x

10、 2 & x = 10D) x = 1024. A) x = 2B) x -1 | | x -1 & x -1 x = 225. A) y = -1B) y = 0C) x = 0D) x = -1IV. (1)What is the purpose of the following program? #include#define N 10 main()int t, i, j, aN+1 ;printf(“please input 10 integers:”);for (i=1; i=N; i+)scanf(“%d”, &ai);printf(“n”);for (i=1; i=N-1; i+

11、) for (j=1; j=N-i; j+)if (ajaj+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 int k = 1;char a = “IBM computer”, b = “C program”;int fuc();main()int p = 3;while (putchar(ak) k+; /*k=12*/putchar(n);prin

12、tf(“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(%d, %dn, m, k);return (m+k);OUTPUT:BM computerk=12,C program k=9 36, 12 3, 48 Irogram computerV. Check Error in the program according

13、 to the following description and correct them, write the whole corrected program on the answer sheetA programmer wants to write a program to simulate a roll of the dice. The programmer decides to have the program choose two pseudo-random numbers from 1 to 6 and output the two numbers. If two values

14、 are the same, the program should also output the string Thats a pair! after printing the two values.The programmer writes the following code:#include #include #include int main(void)int dice2;srand(time(NULL);for (x = 0; x = 2; x+);dicex = rand() % 6;printf (You rolled a %d and a %d.n, dice0, dice1

15、);if (dice0 = dice1)printf(Thats a pair!n);return 0;The above code has 5 errors in it! What are they?沒有定義xfor (x = 0; x = 2; x+);應改為for (x = 0; x = 2; x+)dicex = rand() % 6;應改為（dicex = rand() % 7）+1 /*超綱*/for (x = 0; x = 2; x+);應改為x 2if (dice0 = dice1)應改為=VI. Writing a program Write a complete progr

16、am that allows the user to enter 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 the string without its last character. The t

17、hird row should be the string without its last two characters. Etc. The Nth and final row should be only the first letter of the string.Here is a sample run, assuming the user types “Hello World!” when prompted:Enter a string: Hello World!Hello World!Hello WorldHello WorlHello WorHello WoHello WHello HelloHellHelHeHPretest and posttest loop； modular programs； binary operator； file； the amount of storage； continue break statement； Automatic variable；