int main()
{
int num,reverse;
printf("\n Enter a number to be reversed: ");
scanf("%d",&num);
reverse = reverseNum(num);
printf("\n The reverse of the number %d is: %d",num,reverse);
return 0;
}
/**
* @param k:
* @return: the sum of first k even-length palindrome numbers
*/
int sumKEven(int k) {
// Write your code here
int base = 10, start = 1, sum = 0;
while (k--) {
sum += (start * base + reverseNum(start));
if (++start >= base)
base *= 10;
}
return sum;
}
int main (void){
int number, reverse, reverse2, difference, sum;
// Get Number from User
printf("Please enter a 3 digit number in which the digits decrease in value (i.e. 542) : ");
scanf("%i", &number);
// Reverse number
reverse = reverseNum(number);
// Subtract original number from reversed number
difference = difNum(number, reverse);
// Take the difference of the previous equation and reverse the digits
reverse2 = reverseNum(difference);
// Add the difference and and the reversed number
sum = sumNum(difference, reverse2);
// return value : will always be 1089
printf("%i - %i = %i, %i + %i = %i\n", number, reverse, difference, difference, reverse2, sum);
}
int count(int goal){
int currentCnt = 1;
int currentNum = 1;
while(currentNum != goal){
int nextInc = incNum(currentNum);
int nextReverse = reverseNum(currentNum);
if(nextInc >= nextReverse || nextReverse > goal){
currentNum = nextInc;
}else{
currentNum = nextReverse;
}
currentCnt++;
}
return currentCnt;
}
int main ( int argc, char *argv[] )
{
int primeCheckStorage;
int reverseNumStorage;
int palindromeCheckStorage;
int input = 0;
int x = 0;
//int y = 0;
//int z = 0;
int primeFlag = 0;
int reverseFlag = 0;
int palidromeFlag = 0;
int readFlag = 0;
int writeFlag = 0;
int output;
//char *stringToParse;
FILE *fp = NULL;
/*
* SECTION 2 FLAG RAISING
* For this section we are taking the command line arguments and going through them
* and checking to see which ones were entered by the user
* Additionally if one was entered by the user we will raise its appropriate flag to call associated
* code and functions form it
*/
for(int i = 0 ; i < argc; i++)
{
if(argv[i][0] == '-' && argv[i][1] == 'h')
{
options(); //here we are checking if there is a -h giving it precedence and breaking out of the loop
primeFlag = 0;
reverseFlag = 0;
palidromeFlag = 0;
readFlag = 0;
writeFlag = 0;
break;
}
if(argv[i][0] == '-' && argv[i][1] == 'p')
{
primeFlag = 1;
}
if(argv[i][0] == '-' && argv[i][1] == 'r')
{
reverseFlag = 1;
}
if(argv[i][0] == '-' && argv[i][1] == 'd')
{
palidromeFlag = 1;
}
if(argv[i][0] == '-' && argv[i][1] == 'f')// get file name and READ from File
{
//check to see if there is a file name
if( argv[i+1] == NULL)
{
printf("expecting argument following -f \n");
}
//copy file name
inFile = argv[i+1];
fp = fopen(inFile, "r");
if(!fp)
{
printf("Can not open %s \n" , inFile);
return 0;
}
else
//read data from file
fclose(fp);
readFlag = 1;
}
if(argv[i][0] == '-' && argv[i][1] == 'o')
{
//check to see if there is a file name
if( argv[i+1] == NULL)
{
printf("expecting argument following -o \n");
}
//copy file name
outFile = argv[i+1];
fp = fopen(outFile, "w");
//write data from user to file
if(!fp)
{
printf("Can not open %s \n" , outFile);
return 0;
}
else
//write to file
fclose(fp);
writeFlag = 1;
}
}
/*
* For this section we will be checking if there were 3 commands entered or 2 of each command OR
* both of the read/write commands entered
* IF ANY of these conditions occur we throw and error message to the user.
*/
if((primeFlag == 1 && reverseFlag == 1 && palidromeFlag == 1) ||
(primeFlag ==1 && reverseFlag == 1)|| (primeFlag == 1 && palidromeFlag == 1) ||
(reverseFlag ==1 && palidromeFlag == 1))
{
printf("Please use only 1 command at a time. \n");
printf("Usage: ./prog [-p/-r/-d] –f filename –o filename \n");
//we are going to reset the flags to stop program flow.
primeFlag = 0;
reverseFlag = 0;
palidromeFlag = 0;
readFlag = 0;
writeFlag = 0;
/*
* SECION 3
* This section of code is where all my manipulations on the files and the user input
* happens. WE are also check certain conditions to differentate whether or not we
* want to take user input or input to a file or write to a file
*/
}
else if((primeFlag == 1) && (readFlag == 0))
{
printf("You have selected finding a prime number. \n");
printf("Please enter a positive integer: \n");
scanf("%d", &x);
primeCheckStorage = checkPrime(x);
if(primeCheckStorage == -1)
{
printf("Please enter a positive integer. \n");
}
else if(primeCheckStorage == 1)
{
printf("Number %d is a prime number. \n", x);
}
else
{
printf("Number %d is NOT a prime number. \n", x);
}
}
else if((reverseFlag == 1)&& (readFlag == 0))
{
printf("You have selected reversing a number. \n");
printf("Please enter the integer you wish to reverse: \n");
scanf("%d", &input);
reverseNumStorage = reverseNum(input);
printf("Reverse of %d is %d. \n", input, reverseNumStorage);
}
else if((palidromeFlag == 1) && (readFlag == 0))
{
printf("You have selected checking if a number is a palindrome. \n");
printf("Please enter the integer you wish to check: \n");
scanf("%d" , &input);
palindromeCheckStorage = palindrome(input);
if( palindromeCheckStorage == 1)
{
printf("The number %d is a palindrome \n", input);
}
else
{
printf("The number %d is NOT a palidrome \n", input);
}
}
if((readFlag == 1) && (primeFlag == 1))
{
fp = fopen(inFile, "r");
fscanf(fp, "%d", &output);
//if else (call the approbate function)
if(primeFlag == 1)
{
primeCheckStorage = checkPrime(output);
if(primeCheckStorage == -1)
{
printf("Please enter a positive integer. \n");
}
else if(primeCheckStorage == 1)
{
printf("Number %d is a prime number. \n", output);
}
else
{
printf("Number %d is NOT a prime number. \n", output);
}
}
fclose(fp);
}
if((readFlag == 1) && (reverseFlag == 1)) //reverse the number
{
fp = fopen(inFile, "r");
fscanf(fp, "%d", &output);
reverseNumStorage = reverseNum(output);
printf("Reverse of %d is %d. \n", output, reverseNumStorage);
}
if((readFlag == 1) && (palidromeFlag == 1)) //expcitely dictate this condition
{
fp = fopen(inFile, "r");
fscanf(fp, "%d", &output);
palindromeCheckStorage = palindrome(output); //get the num from the function
if( palindromeCheckStorage == 1)
{
printf("The number %d is a palindrome. \n",output );
}
else
{
printf("The number %d is NOT a palindrome. \n", output);
}
}
if(writeFlag == 1)
{
fp = fopen(outFile , "w");
if(!fp)
{
puts("cannot open data file!");
return 0;
}
//get data from user
printf("Please enter a number to write to the file");
scanf("%s", inputData);
fprintf(fp, "%s ",inputData); // write to the file
}
}
