C语言期中考试题.doc

Section 1: Put True (T) or False (F) in the brackets.1. In C program, upper case and lower case letters are distinct.t2. All variables must not be declared before use.f3. The first character of variables name must be a letter.f4.0equals “0”.f5. “#define MAX 100”is a statement.f6. In computer terminology, a program error is called a bug.t7. In C, functions may be nested.t8. Inputting data or a literal is a constant.f9. =+ is a valid C operator.fSection 2: Single Choice.1. An identifier DA. must begin with a letter or digit and can contain letters, digits, or underscoresB. must begin with a digit and can contain letters, digits , or underscoresC. must begin with a letter, digit, or underscore and can contain letters, digits, or underscoresD. must begin with a letter or underscore and can contain letters, digits, or underscores2. The function printf BA. sends data to the printer B. sends data to the screenC. receives data from the keyboard D. receives data from any input3. The basic data types of C are CA. integer, real, imaginary, double B. integer, real, double, characterC. integer, double, float, character D. character, double, real, float4. The value of 10/9 is DA. 1.1 B. 1.111C. 1.1111 D. 15. All variables must have DA. A data type and a name B. An expression and a specifierC. Syntax and logic D. Memory location and status flag6. Expressions containing operators with the same precedence are evaluated according to their CA. order B. associativity C. hierarchy D. position7. Any expression that is terminated by a semicolon is BA. a constant B. a statementC. evaluated from left to right D. illegal unless an equal sign is preceding8. Assuming x = 10, the expression: x += 15*6 changes the value of x to BA. 150 B. 100C. 900 D. 909. Assuming x is 10, what is the output: printf(“%d”,+x); DA. 8 B. 9C. 10 D. 1110. When using a scanf function to input multiple values, the user must separate the input with BA. commas B. spacesC. semicolons D. forward slashes11. Assume a = 5, b = 2, c = 4, d = 6, and e = 5. What is the value of e % b * c 5 | c % d * e 7 is BA. 0 B. 1C. 2 D. 312. In a switch statement, the keyword break BA. is accessed if none of the other case values match the expressionB. causes the program to exit the switch statement completelyC. causes the program to move the default caseD. causes the program to terminate13. What is the output from the following loop:i = 10;while (i=10) printf (“%dn”, i); BA. No outputB. The number 10 will be output infinitelyC. The number 10 will be output exactly one timeD. The number 0 through 10 will be output14. When placed in a while loop, the continue statement CA. Causes the loop to terminate B. Causes the program to terminateC. Skips to the next iteration of the loop D. Does nothing in a while loop15. The components of a function header include DA. call, return value, prototype B. argument list, parameter list, callC. function body, function call, argument listD. return type, name, parameter listSection 3: Expression calculation and fillong blanks.1. The items enclosed within the parentheses in a function call statement are called _formal parameters_.2. The statement for (i= 1; I=10&2 5 ) b = 7;else if ( a 0 ) if ( n 0 ) if ( a b ) z = a; if ( a b ) else z = a; z = b; else z = b;Please describe the difference between structure(A) and (B). 3. What a while loop that is equivalent to the for loop given below. For (k = 0; k 10; k + ) sum = sum + k; 4. Please write the output of the following statements .viod main() int s=1,t=1,a,n;scanf(“%d%d”, &a, &n); for (int i=1;in;i+) t=t*10+1; s=s+t; s*=a;printf(“SUM=%dn”,s);Input data: 2 4Answer: _2468_.5. Please write the output of the following func (int a, int b) static int m = 0, i = 2; i += m + 1; m = i + a + b; return (m);main() int k = 4, m = 1, p1, p2; p1 = func(k, m); p2 = func(k, m); printf(“%d, %dn”, p1, p2);Answer:_8, 17_6. Please write the output of the following k, s;for(k = 1, s = 0; k 10; k+) if(k % 2 = 0) continue; s += k;Printf(“k = %d s = %d”, k, s);Answer:_k=10 s=25_ 7. Please write the output of the following program.#includevoid main() int k, x, s, t; x = 3; s = 0;t = x;for( k = 1; k = 3; k+) t = t * 10 + x; s = s + t; printf(“%d#”, s); Answer:_. Section 5: Programming1. Write an interactive program that asks the user to enter a month number( between 1 and 12).Program need to check user input:(1). If the input is invaid, display error message and prompt user reenter number.(2). If the input is valid, the program should dispay the month name of input number.(e.g. Input is “1”, then output is”January”). 2. Find numbers: these numbers which are satisfied with the following four conditions:(1).