Answer Happy

1. Among the following four options, the options that are all invalid user identifiers are 0. (A) A P_0 do (B) b_a flot _123 (C) goto _A while (D) 1a char -a 2. If x, y and z are all int variables, then the value of z after running the following expression is 0. x=2; y=1;z=5;z* = x+y; (A) 10 (B) 11 (C) 15 (D) none of above 3. The following incorrect character constant is (). (A) "a" (B) 'n' (C) 'a' (D) 9 4. It is known that the description of each variable type is as follows, then which option will not conform any cors (both grammar and run time) int a, b; float w=5; double x=3.14159; (A)a= w%3; (B) a = x%3; (C) a = a/b; (D) b=w+x; 5. Which data type has higher precision? 0 (A) char (B) int (C) float (D) double 6. If: char a; int b; double c; Then the data type of the value of the expressi a-b+(a*c)-3.14 is (. (A) float (B) char(C) int (D) double 7. If:char a; int b; float c;double d; Which statement is correct (. (A) printf("%d is a factor of %d.\n", b); (B) printf("%d is a real number. In”, c); (C) printf("%c is a real number. In", c); (D)printf ("%lf is a real number. In", d); Notice: Please write clearly and legibly. In total 06 pages, This is page 教务处试题编号:311- 课程名称: 任课教师: Student ID: Student Name: 8. There is a program segment, and the input expression and output expression corresponding to the input data form and out form should b O, respectively. int maino { int x; float y; printf("Enter x, y:"); Il input expression I/ output expression return 0; } console: enter x,y: 1 3.14 X+y=4.140 Press any key to continue...... ID *** ******* (A) scanf("%d,%f", &x, &y); printf(“nx+y=%.3f”, x+y); (B) scanf("%d, %f",&x, &y); printf("x+y=%.3f", x+y); ALALA