Quiz 5 - Loops
Which input value causes "Goodbye" to be output next? int x; scanf("%d", &x); while (x >= 0) { // Do somethingscanf("%d", &x); } printf("Goodbye\n");
-1
How many times will the while loop below iterate? int A = 0; while(A) { A++; }
0
What is the output? j and k are ints. for (j = 0; j < 2; ++j) { for (k = 0; k < 4; ++k) { if (k == 2) { break; } printf("%d%d ", j, k); } }
00 01 10 11
How many times will the while loop below iterate? int A = -1; while(A) { A++; }
1
How many times will the for loop below iterate? int i; for( i=0; i<10; i++ ) if (i==2) continue;
10
How many times will the for loop written below iterate? int i; for( i=0; i<10; i++ ) ;
10
What is the output? int num = 10; while (num <= 15) { printf("%d ", num); if (num == 12) { break; } ++num; } printf("Done");
10 11 12 Done
What is the ending value of sum, if the input is 2 5 7 3? All variables are integers. scanf("%d", &x); sum = 0; for (i = 0; i < x; ++i) { scanf("%d", &currValue); sum += currValue; }
12
What is the output? int x = 18; while (x > 0) { // Output x and a space x = x / 3; }
18 6 2
For the given program, how many printf statements will execute? void PrintShippingCharge(double itemWeight) { if ((itemWeight > 0.0) && (itemWeight <= 10.0)) { printf("%lf\n", itemWeight * 0.75); } else if ((itemWeight > 10.0) && (itemWeight <= 15.0)) {printf("%lf\n", itemWeight * 0.85); } else if ((itemWeight > 15.0) && (itemWeight <= 20.0)) {printf("%lf\n", itemWeight * 0.95); } } int main(void){ PrintShippingCharge(18); PrintShippingCharge(6); PrintShippingCharge(25); return 0; }
2
How many x's will be output? Assume row and col are integers. for (row = 0; row < 2; ++row) { printf("x"); for (col = 0; col < 3; ++col) { // Do something } }
2
What is the output if count is 4? for (i = count; i > 0; --i) { // Output i }
4321
What is the output? double CheckForFever (double temperature) { const double NORMAL_TEMP = 98.6; const double CUTOFF_TEMP = 95; double degreesOfFever; if (temperature > NORMAL_TEMP) { degreesOfFever = temperature - NORMAL_TEMP; printf("You have %lf degrees of fever.", degreesOfFever); } else if (temperature < CUTOFF_TEMP) { degreesOfFever = CUTOFF_TEMP - temperature; printf("Your temperature is %lf below 95.", degreesOfFever); } return degreesOfFever; } int main(void) { double bodyTemperature; double degreesOfFever; bodyTemperature = 96.0; printf("Checking for fever..."); degreesOfFever = CheckForFever(bodyTemperature); return 0; }
Checking for fever...
Which input for char c causes "Done" to be output next? c = 'y'; while (c = 'y') { // Do somethingprintf("Enter y to continue, n to quit: \n"); scanf("%c", &c); } printf("Done\n");
No such value (infinite loop)
What is the output? void WaterTemperatureForCoffee(int temp) { if (temp < 195) { printf("Too cold."); } else if ((temp >= 195) && (temp <= 205)) { printf("Perfect temperature."); } else if (temp > 205) { printf("Too hot."); } } int main(void) {WaterTemperatureForCoffee(205); WaterTemperatureForCoffee(190); return 0; }
Perfect temperature.Too cold.
Which for loop will iterate 100 times?
for (i = 0; i < 100; i++)
A loop should output 1 to n. If n is 5, the output is 12345. What should XXX and YYY be? Choices are in the form XXX / YYY. scanf("%d", &n); for (XXX; i++) { printf("%d", YYY); }
i = 0; i < n / i + 1;
What is the output? int columns; int rows; for (rows = 0; rows < 2; ++rows) { for (columns = 0; columns < 3; ++columns) { printf("x"); } printf(" "); }
xxx xxx
