Code:
#include<stdlib.h>
int sumFor(int daNumba);
int sumWhile(int daNumba);
/* Main function */
int main()
{
/* Declare variables */
int daNumba, startNumba, ansFor, ansWhile;
/* Display welcome message */
printf("\nWelcome to sumTimes2.\n");
/* Message indicating what the program will do */
printf("\nThis program will sum the integers between the one you enter and\n");
printf("the integer that is twice that value.\n");
/* Ask the user to enter and receive an integer */
printf("\nPlease enter your integer: ", daNumba);
scanf("%d", &daNumba);
/* sumFor program */
int sumFor(int daNumba)
{
int ansFor=0, startNumba=daNumba;
for( ; startNumba <= (daNumba*2); )
{
ansFor += startNumba++;
}
for( ; startNumba >= (daNumba*2); )
{
ansFor += startNumba--;
}
return ansFor;
}
/* sumWhile program */
int sumWhile(int daNumba)
{
int ansWhile=0, startNumba=daNumba;
while(daNumba >0 && startNumba <= (daNumba*2))
{
ansWhile += startNumba++;
}
while(daNumba <= 0 && startNumba >= (daNumba*2))
{
ansWhile += startNumba--;
}
return ansWhile;
}
/* Display test statistics */
printf("\nFor says the sum is %d\n", sumFor(daNumba));
printf("While says the sum is %d\n", sumWhile(daNumba));
/* Display ending thank you message */
printf("\nThank you for using sumTimes2. Bye!\n\n");
/* Rieturn 0 for the compiler */
return 0;
}