CSCE 150A (Fall 2009) Midterm Review

• Basic C: preprocessor directives, standard libraries, comments, reserved words
• #include<stdio.h>, #include<math.h>, #define
• /* ... */ vs // ...
• int, double, char, main, etc.
• Variables: identifier rules, types, precision, scope
• What is a valid identifier name? What makes one invalid?
• What are the basic data types we've covered? What range of values can they take on?
• What are variable scoping rules? E.g. what is the output of the following program?

       #include<stdio.h>
       int function(int a, int b);
       int main()
       {
         int z=5, y=10, x=1;
         x = function(z, y);
         printf("x = %d, y = %d, z = %d\n", x, y, z);
       }
       int function(int a, int b)
       {
         int z;
         z = 3;
         b = 15;
         return a * b;
       }

• Input/Output: scanf and printf, fscanf and fprintf
• C Expressions: arithmetic operators, type casting, order of precedence
• Functions: library functions, prototypes, return types, parameters
• sin, cos, sqrt, pow, etc.
• E.g. in above code, what is output by
  printf("%d\n", function(function(2,3), function(4,5)));
• Conditionals: if, if-then-else, switch statements, logical operators, short-circuiting
• &&, ||, ==, !=, <, <=, >, >=, !
• What is result of e.g.
  (x == 0) || (x != 0)
• What happens if we know that the first part of a logical OR (||) is true?

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