1.What are the basic module of a C program called?
They are called functions.
2.What is a syntax error? Give an example of one in English and one in C.
A syntax error is a violation of the rules governing how sentences or programs are put together. Here's an example in English:"Me speak English good." Here's an example in C.
printf"Where are the parentheses?";3.What is a semantic error? Give an example of one in English and one in C.
A semantic error is one of meaning. Here's an example in English : " This sentence is excellent Czech." Here's a C example:
thrice_n = 3 + n;4.Indiana Sloth has prepared the following program and brought it to you for approval. Please help him out.
Line 1: Begin with a #; spell the file stdio.h; place the filename within angle brackets.
Line 2: Use() , not {}; end the comment with */, not /*.
Line 3: Use {, not (.
Line 4: Complete the statement with a semicolon.
Line 5: Indiana got this one (the blank line) right!
Line 6: Use =, not := for assignment.(Apparently, Indiana knows a little Pascal.) User 52, not 56, weeks per year.
Line 7: Should be
printf("There are %d weeks in a year.
", s);Line 8: There isn't a line 9, but there should be, and it should consist of the closing brace, }.
5. Assuming that each of the following examples is part of a complete program, what will each one print?
a. printf("Baa Baa Black Sheep.");
printf("Have you any wool? ");
b. printf("Begone! O creature of lard! ");
c. printf("What? No/nfish? ");
d. int num;
num = 2;
printf("%d + %d = %d", num, num, num + num);
a: Baa Baa Black Sheep.Have you any wool? (Note that there's no space after the period. You could have had a space by using " have instead of "have.)
b: Begone!
O creature of lard! (Note that the cursor is left at the end of the second line.)
c: What?
No/nfish? (Note that the slash[/] does not have the same effect as the backslash []; it simply prints as a slash.)
6. Which of the following are C keywords? main , int , function , char , =
int and char.
7. How would you print the values of the variables words and lines so they appear in the following form:
There were 3020 words and 350 lines.
Here, 3020 and 350 represent the values of the two variables.
printf("There were %d words and %d lines.
", words, lines);8. Consider the following program:
#include <stdio.h>
int main(void) {
int a, b;
a = 5;
b = 2; /* line 7 */
b = a; /* line 8 */
a = b; /* line 9 */
printf("%d %d
", b, a);
return 0;
}What is the program state after line 7? Line 8? Line 9?
After line 7, a is 5 and b is 2. After line 8, both a and b are 5. After line 9, both a and b are still 5. (Note that a cant be 2 because by the time you say a = b; b has already been changed to 5.)
9. Consider the following program:
#include <stdio.h>
int main(void) {
int x, y;
x = 10;
y = 5; /* line 7 */
y = x + y; /* line 8 */
x = x * y; /* line 9 */
printf("%d %d
", x, y);
return 0;
}
What is the program state after line 7? Line 8? Line 9?
After line 7, x is 10 and y is 5. After line 8, x is 10 and y is 15. After line 9, x is 150 and y is 15.