"Learning the path of iOS: C language" C language error-prone questions collation.

Note: This type of question is a relatively basic question, but it is easy for people to ignore, or usually do not care.

1. The value of the expression 3.6-5/2+1.2+5%2 is (D).

A. 4.3 B. 4.8 c.3.3 D. 3.8

2. With description: Char w;int x;float y;double z; The data type of the expression w*x+z-y value is: (D)

A. Float B. Char C. int D. Double

3. The following description of operator precedence is correct: (C)

A. Relational operators < arithmetic operators < Assignment operators < logic and operators B. Logic and operators < relational operators < arithmetic operators < Assignment operators

C. Assignment operators < logic and operators < relational operators < arithmetic operators D. Arithmetic operators < relational operators < Assignment operators < logic and operators

4. With definition: int k=0; The four expressions of the following options differ from the values of the other three expressions: (A)

A. k++ B. k + = 1 C. ++k D. k + 1

The basic unit of the 5.C language source program is: (B)

A. Procedure B. function C. subroutine D. identifier

6. The output of the following program is: (D)

Main ()
{
int k=17;
printf ("%d,%o,%x", k,k,k);
}a.17 021 0X11 B. C. 0X11 021 d.17 21 11
7. The following description of the error is: (C)The # include and # define lines in the A.C program are not c statements.B. The assignment operator has the lowest precedence except the comma operatorC.C program, "J + +;" is an assignment statementthe D.C program compiles and connects the steps to form a truly executable binary machine instruction file.
8. The value of sum after the following program execution is: (C)
Main ()
{
int i,sum;
for (i=1;i<6;i++) sum+=i;
printf ("%d", sum);
}a.15 b.14 C. Uncertainty d.0
9. Set I and k are all int types, then the FOR Loop statement: for (i=0,k=-1;k=1;i++,k++) printf ("* * *");(D)

A. The condition of the end of the loop is not legal B. The loop body does not execute at a time C. The loop body executes only once D. is an infinite loop

10. Set int x=1, Y=1; An expression (!x| | y--) The value is (B)

A. 0 B. 1 C. 2 d.-1

11. The output of the following program is: (A)

#define ADD (x) x*x
Main ()
{
int A=4,b=6,c=7,d=add (a+b) *c;
printf ("d=%d", D);
}

A. D = B. D = C. D = d = 700

12. Use a macro to find the maximum value in three numbers, and the macro definition is correct (a)

A. #define MAX (A,b,c) ((a) > (b)? ( A):(B)) >c? ((a) > (b)? (a):(B)):(C)

B. #define MAX (A,b,c) (A>B?A:B) >c? (A>B?A:B): C

C. #define MAX (A,b,c) (a) > (b)? (a):(B) >c? ((a) > (b)? (a):(B)):(C)

D. #define MAX (a,b,c) a>b?a:b>c? (A>B?A:B): C

13. There are the following procedures

Main ()
{
Char s[]= "ABCD", *p;
for (p=s+l; p < s+4; p++)
{
printf ("%s", p);
}
}
The output of the program is: (D)

A. ABCD BCD CD D B.  A B c D c. B C D d. BCD CD D

14. The address of a variable is called a pointer to the variable (√)

15. Recursive invocation of a function is simply a function that invokes itself directly or indirectly. (√).Any expression statement is composed of an expression plus a semicolon. (√)
17. There is the following procedure main () {

Char p[]={' A ', ' B ', ' C '},q[]= ' abc ';

printf ("%d%d\n", sizeof (p), sizeof (q));

};

After the program runs and the output is (C)

A. 4 4 B. 3 3 c. 3 4 D. 4 3

"Learning the path of iOS: C language" C language error-prone questions collation.