While loops

Write an expression that executes the loop while the user enters a number greater than or equal to 0.

Note: These activities may test code with different test values. This activity will perform three tests, with userNum initially 9 and user input of 5, 2, -1, then with userNum initially 0 and user input of -17, then with userNum initially -1. See “How to Use zyBooks”.

Also note: If the submitted code has an infinite loop, the system will stop running the code after a few seconds, and report “Program end never reached.” The system doesn’t print the test case that caused the reported message.

#include <stdio.h>

int main(void) {
 int userNum;

userNum = 9;

while (userNum>=0) {
 printf("Body\n");
 scanf("%d", &userNum);
 }
 printf("Done.\n");

return 0;
}

Basic while loop expression.

Write a while loop that prints userNum divided by 2 (integer division) until reaching 1. Follow each number by a space. Example output for userNum = 40:

20 10 5 2 1

Note: These activities may test code with different test values. This activity will perform four tests, with userNum = 40, then with userNum = 2, then with userNum = 0, then with userNum = -1. See “How to Use zyBooks”.

#include <stdio.h>

int main(void) {
 int userNum;

userNum = 40;


 while(userNum>1){
 userNum=userNum/2;
 printf("%d ",userNum);
 }

printf("\n");

return 0;
}