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The word “algorithm” just means “list of steps for accomplishing a task”. So to write an algorithm in the form of a C function, just write the steps required to complete the function’s task, first in English (as comments), then in C.For example, say you want to find the divisors of an integer, using a C program taking its input from a command-line argument like so:divisors 4856(should print: 1 2 4 8 607 1214 2428 4856)How do you do that?Well, split the task up into steps:Check to see that there is a command-line argument; abort if there isn’t one.Extract integer from command-line argument and store in a variable called “Number”.Consider each integer i from 1 through Number. If Number%i (where % is the “modulo” operator) is 0, then i is a divisor of Number, so print it.That’s your 3-step “algorithm”. Now, what would that look like in C? Something like this:#include <stdio.h> #include <stdlib.h> #include <stdint.h>  int main(int Fred, char* Ethel[]) {  unsigned long i = 0;  unsigned long Number = 0;    // ALGORITHM STEP 1: ABORT IF NO CL ARGUMENT:  if (Fred != 2) {return 666;}   // ALGORITHM STEP 2: GET NUMBER FROM CL ARGUMENT:  Number = strtoul(Ethel[1], NULL, 10);   // ALGORITHM STEP 3: FIND & PRINT DIVISORS:  for ( i = 1 ; i <= Number ; ++i )  {  if (0 == Number % i)  {  printf(" %lu", i);  }  }  return 0; } 

What is Sufism?Sufism, in simple terms, is an effort to get close to Allah Subhanahu wa ta ala by pleasing him, through his remembrance.This also meant abandoning anything (desires, passions, sins, ambitions, pride, lust, etc.) that could take one away from Allah SWT.As a result, Sufis apart from fulfilling their religious obligations (Salah, Saum, and hajj), devoted their time in the remembrance of God."Tasawwuf is based on eight qualities:Generosity like that of Prophet Abraham (as),Cheerful submission like that of Prophet Ishaque (as),Patience like that of Yaqoob (as),Prayer like that of Prophet Zachariah (as),Poverty like that of Prophet Yahya (as),Wearing of woolen dress like that of Prophet Musa (as),Traveling about like that of Prophet Issa and (as),Religious poverty like that of Prophet Muhammad."—Abdul Kadir Gilani[1][1][1][1]When you get the ability assign this world to your Nafs, the Nafs, the next world to your heart and the Lord to your soul.—Abdul Qadir GilaniWealth is your servant and you are the servant of the Lord.—Abdul Qadir Gilani"The dunyâ distracts and preoccupies the heart and body, but al-zuhd (asceticism, not giving importance to worldly things) gives rest to the heart and body. Verily, Allâh will ask us about the halâl things we enjoyed, so what about the harâm!"—Hasan Al Basri[2][2][2][2] (Al-Bayhaqi,[3][3][3][3] Al-Zuhd Al-Kabîr)"While I am in this world, all I want from this world is to remember You, and my only wish for the hereafter is to be able to see You. Other than this, do with me as You wish.—Rabia Basri[4][4][4][4]Oh Lord: The Stars are shining and the eyes of man are closed and kings have shut their doors and every lover is alone with his beloved and here am I alone with Thee.—Rabia BasriIt’s disappointing to see that there is only one good answer here, but why is that?If you think that Sufism is just an innovation and that it's a deviation from Qur'an and Sunnah, then you might have read about it but have clearly failed to understand it.Your opinion on Sufism is similar to a person living here-Telling everyone what this is-Is Sufism Islamic?Yes, Sufism, at its heart, is anything but Islamic.But the question is, who inspired the Sufis in the first place?First and foremost, the Qur’an did-And remember your Lord within yourself in humility and in fear without being apparent in speech - in the mornings and the evenings. And do not be among the heedless. (7:205)Indeed, the Muslim men and Muslim women, the believing men and believing women, the obedient men and obedient women, the truthful men and truthful women, the patient men and patient women, the humble men and humble women, the charitable men and charitable women, the fasting men and fasting women, the men who guard their private parts and the women who do so, and the men who remember Allah often and the women who do so - for them Allah has prepared forgiveness and a great reward. (33:35)O you who have believed, remember Allah with much remembrance. And exalt Him morning and afternoon. (33:41–42)Wealth and children are [but] adornment of the worldly life. But the enduring good deeds are better to your Lord for reward and better for [one's] hope. (18:46)O, my people, this worldly life is only [temporary] enjoyment, and indeed, the Hereafter - that is the home of [permanent] settlement. (40:39)And this worldly life is not but diversion and amusement. And indeed, the home of the Hereafter - that is the [eternal] life, if only they knew (29:84)And keep yourself patient [by being] with those who call upon their Lord in the morning and the evening, seeking His face [i.e., acceptance]. And let not your eyes pass beyond them, desiring adornments of the worldly life, and do not obey one whose heart We have made heedless of Our remembrance and who follows his desire and whose affair is ever [in] neglect. (18:28)Know that the life of this world is but amusement and diversion and adornment and boasting to one another and competition in increase of wealth and children - like the example of a rain whose [resulting] plant growth pleases the tillers; then it dries and you see it turned yellow; then it becomes [scattered] debris. And in the Hereafter is severe punishment and forgiveness from Allah and approval. And what is the worldly life except the enjoyment of delusion. (57:20)Then, the best of Muslims did-Ali ibn Abi Talib RA-Nahj al-balagha-[5]There are people who worship Allah to gain His Favors, this is the worship of traders; while there are some who worship Him to keep themselves free from His Wrath, this is the worship of slaves; a few who obey Him out' of their sense of gratitude and obligations, this is the worship of free and noble men.When some blessings come to you, do not drive them away through thanklessness.One who rushes madly after inordinate desires runs the risk of encountering destruction and death.Contentment is the capital that will never diminish.Wealth is the fountainhead of passions.A virtuous person is better than virtue and a vicious person is worse than vice.It is wiser to abstain than to repent.Jihad is divided into four branches:to persuade people to be obedient to Allah;to prohibit them from sin and vice;to struggle (in the cause of Allah) sincerely and firmly on all occasions andto detest the vicious.Whoever persuades people to obey the orders of Allah provides strength to the believers; whoever dissuades them from vices and sins humiliates the unbelievers; whoever struggles on all occasions discharges all his obligations and whoever detests the vicious only for the sake of Allah, then Allah will take revenge on his enemies and will be pleased with Him on the Day of Judgment.To refrain from the unlawful and impious sources of pleasures is an ornament to the poor and to be thankful for the riches granted is the adornment of wealth.If you understand Allah's Majesty, then you will not attach any importance to the creatures.There are so many highly esteemed ones who became miserable and humiliated just because of their bad temper and morals; and humble people who have attained eminence and the highest honors because of good temper and morals.—Majlisi, Bihārul Anwār, vol. 71, p. 396Uthman ibn Affan RA-If our hearts were truly pure, we would never have our fill of the words of your Lord.—Jami al-Uloon wa'l-Hikm, p. 363Concern with this world is darkness in the heart, but concern with the Hereafter is light in the heart.—Al-Isti'ad li Yawm al-Mia'd, p. 9Hasan ibn Ali RA-I wonder at those who think about their body's food, but do not think about their soul's food. They keep away disturbing food from their belly but fill up their hearts with destructive subjects.—Safīnatul Bihār, Article of TasteHusayn ibn Ali RA-If you neither believe in religion nor fear the hereafter, then at least be free from tyranny and arrogance—Biharul Anwar, Vol. 45, P. 51Those who worship God for the hope of gaining, they’re not real worshippers, they’re merchants. Those who worship God out of fear (of punishment), they’re slaves. And those who worship God to be grateful towards their creator, they are the free people, and their worship is a real one.—Majlisi, Bihārul Anwār, vol.78, p. 117Whoever seeks the satisfaction of people through disobedience of God, then God subjects him to people.—Majlisi, Bihārul Anwār, vol.78, p. 126And most importantly, their teacher, the king of our hearts did-Muhammad ibn Abdullah ibn Abdul Muttalib ﷺ‎-'Abdullah bin Mas'ud (May Allah be pleased with him) reported:Messenger of Allah (ﷺ) slept on a straw mat and got up with the marks left by it on his body. Ibn Mas'ud (May Allah be pleased with him) said, "O Messenger of Allah! Would that you make us spread out a soft bedding for you." He (ﷺ) replied, "What have I to do with the world? I am like a rider who had sat under a tree for its shade, then went away and left it."[At- Tirmidhi, who classified it as Hadith Hasan Sahih].Riyad as-Salihin 485Mughira b. Shu'ba reported that Allah's Apostle (ﷺ) worshipped so much that his feet were swollen. It was said to him:(Why do you undergo so much hardship despite the fact that) Allah has pardoned for you your earlier and later sins? Thereupon he said: May I not (prove myself) to be a grateful servant (of Allah)?Sahih Muslim 2819 aIn-book reference: Book 52, Hadith 77USC-MSA web (English) reference: Book 39, Hadith 6772 (deprecated numbering scheme)Abu Hurairah [may Allah be pleased with him] narrated that the Messenger of Allah (ﷺ) said:“Allah, the Most-High said: ‘I am as My slave thinks of Me, and I am with him when he remembers Me. If he remembers Me to himself, I remember him to Myself, and if he remembers Me in a gathering, I remember him in a gathering better than that. And if he seeks to draw nearer to Me by a hand span, I draw nearer to him by a forearm’s length, and if he comes to Me by a forearm’s length, I draw nearer to him by an arm’s length. And if he comes to Me walking, I come to him quickly.’”Grade: Sahih (Darussalam)Jami` at-Tirmidhi 3603In-book reference: Book 48, Hadith 234English translation: Vol. 6, Book 46, Hadith 3603'A'isha said:The Apostle of Allah (ﷺ) used to remember Allah at all moments.Sahih Muslim 373In-book reference: Book 3, Hadith 147USC-MSA web (English) reference: Book 3, Hadith 724 (deprecated numbering scheme)It was narrated that Abu Hurairah said:“The Messenger of Allah (ﷺ) said: ‘Frequently remember the destroyer of pleasures,’ meaning death.”Grade: Hasan (Darussalam)Book 37, Hadith 159English reference: Vol. 5, Book 37, Hadith 4258Arabic reference: Book 37, Hadith 4399Sunan ibn MajahNarrated Abu Hurayrah:The Prophet (ﷺ) said: If anyone sits at a place where he does not remember Allah, deprivation will descend on him from Allah; and if he lies at a place where he does not remember Allah, deprivation will descend on him from Allah.Grade: Hasan Sahih (Al-Albani)Sunan Abi Dawud 4856In-book reference: Book 43, Hadith 84English translation: Book 42, Hadith 4838It was narrated that Abu Hurairah and Abu Sa'eed bore witness that the Prophet(ﷺ) said:"No people sit in a gathering remembering Allah, But the angels surround them, mercy covers them, tranquility descends upon them and Allah remembers them before those who are with Him."Grade: Sahih (Darussalam)Sunan Ibn Majah 3791In-book reference: Book 33, Hadith 136English translation: Vol. 5, Book 33, Hadith 3791Abu Musa Al-Ash'ari (May Allah be pleased with him) reported:The Prophet (ﷺ) said, "The similitude of one who remembers his Rubb and one who does not remember Him, is like that of the living and the dead."[Al-Bukhari and Muslim].Riyad as-Salihin 1434Narrated Abu Huraira:The Prophet (ﷺ) said Allah will give shade to seven (types of people) under His Shade (on the Day of Resurrection). (one of them will be) a person who remembers Allah and his eyes are then flooded with tears.Sahih al-Bukhari 6479In-book reference: Book 81, Hadith 68USC-MSA web (English) reference: Vol. 8, Book 76, Hadith 486 (deprecated numbering scheme)Mutarrif bin Abdullah bin Ash-Shikh-khir reported from his father:that he went to the Prophet and he was reciting: ‘The mutual rivalry (for piling up worldly things) diverts you.’ He said: “The son of Adam says: ‘My wealth, my wealth.’ And do you own anything except what you give in charity, such that you’ve spent it, or what you eat, such that you’ve finished it, or you wear, such that you’ve worn it out?”Grade: Sahih (Darussalam)English reference: Vol. 5, Book 44, Hadith 3354Arabic reference: Book 47, Hadith 3678Jami’ at TirmidhiAbdullah bin Mas'ud (May Allah be pleased with him) reported:Messenger of Allah (ﷺ) said: "Do not crave for property lest you should be absorbed in the desire of worldly life."[At- Tirmidhi, who classified it as Hadith Hasan].Riyad as-Salihin 478These are only a few from the plethora of such hadiths, but I think I have made my point clear enough.Footnotes[1] Abdul Qadir Gilani - Wikipedia[1] Abdul Qadir Gilani - Wikipedia[1] Abdul Qadir Gilani - Wikipedia[1] Abdul Qadir Gilani - Wikipedia[2] Hasan al-Basri - Wikipedia[2] Hasan al-Basri - Wikipedia[2] Hasan al-Basri - Wikipedia[2] Hasan al-Basri - Wikipedia[3] Al-Bayhaqi - Wikipedia[3] Al-Bayhaqi - Wikipedia[3] Al-Bayhaqi - Wikipedia[3] Al-Bayhaqi - Wikipedia[4] Rabia of Basra - Wikipedia[4] Rabia of Basra - Wikipedia[4] Rabia of Basra - Wikipedia[4] Rabia of Basra - Wikipedia[5] Nahj al-Balagha - Wikipedia