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`5.7 Exercises
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`Up: 5 Numeric Data Types and Expression Evaluation
`Next: 5.8 Problems
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`5.7 Exercises
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`1. If x is 100 and z is 200, what is the output of the following:
`
`if (z = x)
` printf("z = %d, x = %d\n", z, x);
`
`2. With the following declarations:
`
`int a = 10, b = 15, c = 25;
` float x = 15;
` double y = 30;
` long int m = 25L;
`What are the values and types of the following expressions:
`
`a + b / c * x;
` a + b / x * c;
` a + b / y * c;
` a + b / m * c;
`
` x + a / b;
` x + (int) a / b;
`
`3. Evaluate the expressions following the declarations:
`
`int x, y, z;
` float u, v, w;
`
` x = 10; y= 20; z = 30;
`
` x = z / y + y;
` x = x / y / z;
` x = x % y % z
`
`4. Evaluate the expressions:
`
`int x, y, z;
` float u, v, w;
` x = 10; y= 20; z = 30;
` u = 5.0; v = 10.0; w = 30.0;
`
` x = w / y + y;
` u = z / y + y;
` u = w / y + y;
`
`http://ee.hawaii.edu/~tep/EE160/Book/chap5/section2.1.7.html
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`AMI/MSI/GBT EX 1008
`IPR of Pat. No. 6,282,641
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`5.7 Exercises
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` u = x / y / w + u / v;
`
`5. What is the output of the following program?
`
`#define PRHAPS
`#define TWICEZ z + z
`
`main()
`{ int w, x, y, z;
` float a, b, c;
` w = 16; x = 5; y = 15; z = 8;
` a = 1.0; b = 2.0; c = 4.0;
`
` #ifdef PRHAPS
` x = 15;
` y = 5;
` #endif
`
` printf("(a). %d %d\n", x, y);
` printf("(b). %d\n", TWICEZ * 2);
` printf("(c). %f %f\n", w / z * a + c, z / w * b + c);
` printf("(d). %d\n", z % y % x);
`}
`
`6. What will be the output in the following cases:
`1. #define SWAP(x, y) int temp; temp = x; x = y; y = temp
`main()
`{ int x1 = 10, x2 = 20;
`
` SWAP(x1, x2);
` printf("x1 = %d, x2 = %d\n", x1, x2);
`}
`
`2. #define SWAP(x, y) {int temp; temp = x; x = y; y = temp;}
`main()
`{ int x1 = 10, x2 = 20;
`
` SWAP(x1, x2);
` printf("x1 = %d, x2 = %d\n", x1, x2);
`}
`
`3. #define SWAP(x, y) int temp; temp = x; x = y; y = temp
`main()
`{ int x1 = 10, x2 = 20;
`
` printf("Swapping Values\n");
` SWAP(x1, x2);
` printf("x1 = %d, x2 = %d\n", x1, x2);
`}
`
`7. Write a while and a do...while loop to read and echo long integers until end of file. Allow for the
`possibility that the first input is an end of file.
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`8. Write a for loop to print out squares of integers in the sequence 5, 10, 15, 20, 25, etc. until 100.
`
`9. Given the following declarations:
`
`int x = 100, y;
`What are the values of x and y after each of the following expressions is evaluated (the expressions
`are evaluated in sequence)?
`
`y = x++;
` y = ++x;
` y = ‐‐x;
` y = x‐‐;
`
`10. What are the values of the following expressions considered sequentially:
`
`x = 100; y = 200;
` y = y++ ‐ ++x;
` y = ++y ‐ x++;
` y = ++y * 2;
` y = 2 * x++;
`
`11. Evaluate the following:
`
`x = 100; y = 200;
` y += 2 * x++;
` y ‐= 2 * ‐‐x;
` y += x;
`
`12. Evaluate the following:
`
`x = 100; y = 200; z = 25;
` z = y > x ? x : y;
` z = (z >= x && z >= y) ? z ‐ x * y : z + x * y;
`
`tep@wiliki.eng.hawaii.edu
`Wed Aug 17 08:40:40 HST 1994
`
`http://ee.hawaii.edu/~tep/EE160/Book/chap5/section2.1.7.html
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