1. Cèšèªãšã¯ïŒ
Cèšèªã¯ãã³ã³ãã¥ãŒã¿ãŒããã°ã©ãã³ã°ã§æãåºæ¬çã§éèŠãšãããèšèªã®äžã€ã§ããããšããšã¯ã1970幎代ã«ãã«ç 究æã§ã·ã¹ãã éçºã®ããã«äœãããèšèªã§ãUnixãšãããªãã¬ãŒãã£ã³ã°ã·ã¹ãã ãå®è£ ããããã«äœ¿çšãããŸããã
1.1 Cèšèªã®ç¹åŸŽ
Cèšèªã®ç¹åŸŽãšããŠãæãé¡èãªã®ã¯ãã®æ±çšæ§ã§ããCèšèªã¯ããœãããŠã§ã¢ã®éçºããããŒããŠã§ã¢ã®å¶åŸ¡ãŸã§ãããããæ å ±åŠçãèšè¿°ããããšãå¯èœã§ãããã®ãããä»ã®å€ãã®ããã°ã©ãã³ã°èšèªã®åºç€ãšãªã£ãŠããŸãã
ããã«ãCèšèªã¯ã³ã³ãã€ã©åã®èšèªã§ããããã®çµæçæãããå®è¡ãã¡ã€ã«ã¯åŠçé床ãéããå¹ççãªããã°ã©ã ãäœæããããšãå¯èœã§ãããŸãããã€ã³ã¿ãšããæ©èœãçšããããšã§çŽæ¥ã¡ã¢ãªã«ã¢ã¯ã»ã¹ã»æäœãã§ããé«åºŠãªããã°ã©ãã³ã°ãå¯èœãšãªããŸãã
1.2 Cèšèªãæ±ãå 容
Cèšèªã§ã¯ãå€æ°ã®å®£èšã»æäœãå¶åŸ¡æïŒifæãforæãªã©ïŒãé¢æ°ã®å®çŸ©ãšåŒã³åºãããã€ã³ã¿ãªã©ã®æŠå¿µãå«ãŸããŠããŸãããããã¯å šãŠã®ããã°ã©ãã³ã°ã§éèŠãªåºæ¬çãªèŠçŽ ã§ãããããããç解ãç¿åŸããããšã§ãè³æ ŒååŸã¯ããšãããããŸããŸãªç¶æ³ã®ããã°ã©ã ãå¹çè¯ãå¶äœããããšãå¯èœãšãªããŸãã
2. Cèšèªè³æ Œã®å¿ èŠæ§
ããã°ã©ã ã®äžçã«ãããŠããCèšèªãã¯åºæ¬äžã®åºæ¬ãšãèšããŸãããã®ãããCèšèªè³æ Œãæã£ãŠããããšã¯ããã°ã©ãã³ã°ã¹ãã«ã蚌æããéèŠãªæ段ãšãªãã®ã§ãã
2.1 Cèšèªè³æ Œãæã€æ矩
Cèšèªè³æ Œãæã€æ矩ã¯å€§ããåããŠ3ã€ãããŸããã²ãšã€ç®ã¯ãèªèº«ã®ã¹ãã«ã®èšŒæãšãªãç¹ã§ããè³æ Œãæã€ããšã§ãèªåèªèº«ãCèšèªã«ã€ããŠæ·±ãç¥èãæããŠãããšããããšãæ確ã«ç€ºãããšãã§ããŸããäºã€ç®ã¯ãå°±è·ã»è»¢è·æŽ»åã«ãããã¢ããã³ããŒãžãšãªãããšã§ããããã°ã©ãã³ã°èœåã¯ãå ·äœçãªææç©ããªãéãä»äººã«èŠããããšãé£ãããã®ã§ããããããå ¬çã«èªããããè³æ Œãšãã圢ã§èšŒæã§ãããããäŒæ¥ã«å¯ŸããŠèªèº«ã®èœåãã¢ããŒã«ããéã®åŒ·ã¿ã«ãªããŸããäžã€ç®ã¯ãèšèšããããã°ãä¿å®ãªã©ã®å®æã«å¯Ÿããç解ãæ·±ããããšãã§ããç¹ã§ããè³æ ŒååŸã®ããã®åŠç¿ãéããŠãCèšèªã䜿ã£ãå®éã®éçºã«ãããæè¡åãé€ãããšãã§ããŸãã
2.2 Cèšèªè³æ Œã®æŽ»çšã·ãŒã³
Cèšèªè³æ Œã掻çšã§ããã·ãŒã³ã¯äž»ã«2ã€ãããŸããã²ãšã€ç®ã¯ããšã³ãžãã¢ãšããŠã®ãã£ãªã¢ãæãæããŠããå Žåã§ããç¬åŠã§åŠãã ããšã®èšŒæããç¬èªã®ãããžã§ã¯ããé²ããäžã§ã®èªä¿¡ã«ã€ãªãããŸãããŸããè³æ ŒååŸãç®æãéçšã§ã¯ãCèšèªãããæ·±ãåŠã¶ããšãã§ããããé«åºŠãªæè¡ãç¿åŸããããã®ã¹ããããšãªããŸãããµãã€ç®ã¯ãæ±è·æŽ»åäžãé¢æ¥ã®éã§ããç¹ã«æ°åã®å Žåãå®åçµéšããªãããèªèº«ã®äŸ¡å€ã瀺ãæ段ãéãããŸãããCèšèªè³æ Œãæã£ãŠããããšã§èªåãã³ãŒããæžãèœåãæã£ãŠããããšã蚌æããããšãã§ããŸãã
3. Cèšèªè³æ Œã®çš®é¡
Cèšèªãç¿åŸããäžã§ãè³æ ŒãååŸããããšã¯ç¥èãšã¹ãã«ã®è©äŸ¡ããããŠèªèº«ã®ã¹ãã«ã¢ããã«ã€ãªãããŸãããã®ç« ã§ã¯ãCèšèªã«é¢é£ããäž»ãªè³æ Œã«ã€ããŠè§£èª¬ããŸãããããã®è³æ Œã¯åŠãã å 容ã®å®åãè©Šãããšãã§ããè·å Žã§åœ¹ç«ã€å®è·µçãªç¥èãæè¡ãç¿åŸããæ©äŒã«ããªããŸãã
3.1 åºæ¬æ å ±æè¡è è©Šéš(IP)
åºæ¬æ å ±æè¡è è©ŠéšïŒIPïŒã¯ãæ å ±æè¡ïŒITïŒã®åºæ¬çãªç¥èãšæè¡ãåãè³æ Œã§ããè©Šéšã¯ã¢ã«ãŽãªãºã ãããŒã¿æ§é ãªã©ã®åºæ¬çãªããã°ã©ãã³ã°ã®ç¥èã ãã§ãªãããããã¯ãŒã¯ãããŒã¿ããŒã¹ãªã©ãITå šè¬ã«ãããåºç¯ãªç¥èãåããŸããCèšèªã«ã€ããŠã¯ãåºæ¬çãªææ³ãããã°ã©ã ã®æµããç解ããåé¡ã解ãèœåãæ±ããããŸãã
3.2 é«åºŠæ å ±æè¡è è©ŠéšïŒAPïŒ
é«åºŠæ å ±æè¡è è©ŠéšïŒAPïŒã¯ãIPããäžæ®µéäžã®è©³çŽ°ãªç¥èãšæè¡åãåããŸãããã¡ãã¯ã·ã¹ãã éçºã®å®åçµéšãããæ¹ã察象ãšããŠãããããã°ã©ãã³ã°ã®èœåã ãã§ãªããã·ã¹ãã éçºå šè¬ã«ã€ããŠã®ç¥èãèšèšæè¡ãåãããŸããCèšèªã«é¢ããŠã¯ãããé«åºŠãªããã°ã©ãã³ã°æè¡ãæ±ããããèšèšãããã¹ããŸã§ã®äžé£ã®æµããç解ããŠããããšãå¿ èŠãšãããŸãã
3.3 Cããã°ã©ãã³ã°èœåèªå®è©Šéš
æåŸã«ãç¹ã«Cèšèªã«ç¹åããè³æ Œã§ããCããã°ã©ãã³ã°èœåèªå®è©Šéšã«ã€ããŠè§£èª¬ããŸãããã®è³æ Œã¯Cèšèªã«é¢ãã詳现ãªç¥èãšé«åºŠãªããã°ã©ãã³ã°ã¹ãã«ã蚌æããè³æ Œã§ãããCèšèªã®ææ³ãæšæºã©ã€ãã©ãªããã€ã³ã¿ãã¢ãã¬ã¹ãªã©ã®ç解ãªã©ãCèšèªã«é¢ããç·åçãªåãåãããŸããCèšèªãæ·±ãåŠã³ããããããã¯Cèšèªã䜿ã£ãŠéçºãè¡ãè·ã«å°±ããããšèããŠããæ¹ã«ãšã£ãŠã倧å€äŸ¡å€ã®ããè³æ Œã§ãã
4. åCèšèªè³æ Œè©Šéšã®å 容ãšç¹åŸŽ
æ§ã ãªCèšèªè³æ Œè©ŠéšãååšããŸãããããã§ã¯äž»èŠãªäžã€ãåºæ¬æ å ±æè¡è è©Šéšãé«åºŠæ å ±æè¡è è©ŠéšããããŠCããã°ã©ãã³ã°èœåèªå®è©Šéšã«ã€ããŠè©³ãã解説ããŸãã
4.1 åºæ¬æ å ±æè¡è è©Šéšã®å 容
åºæ¬æ å ±æè¡è è©Šéšã¯ãITæ¥çã§æãåºãèªç¥ãããŠããè³æ Œã®äžã€ã§ãããã®è©Šéšã¯ãæ å ±æè¡ã®åºæ¬ç¥èãšç解ããããŠãã®å¿çšã«é¢ããèœåã枬ãããã®ãã®ã§ãã
è©Šéšã¯ãååãšååŸã®äºéšæ§æãšãªã£ãŠãããååè©Šéšã§ã¯æ å ±æè¡ã®åºæ¬çãªç¥èãåãæäžåé¡ãåºé¡ãããååŸè©Šéšã§ã¯ããã°ã©ãã³ã°ããããã¯ãŒã¯ãããŒã¿ããŒã¹ãªã©ãããå°éçãªç¥èãåãèšè¿°åé¡ãåºé¡ãããŸãã
ç¹ã«Cèšèªã«ã€ããŠã¯ãè¿°ã¹ãããªãšãŒã·ã§ã³ãé¢æ°ãé åãªã©ã®åºæ¬çãªæŠå¿µãããã¡ã¢ãªç®¡çããã€ã³ã¿ã®æäœãªã©ã®ããé«åºŠãªç¥èãŸã§ãå¹ åºãåãããŸãã
4.2 é«åºŠæ å ±æè¡è è©Šéšã®å 容
é«åºŠæ å ±æè¡è è©Šéšã¯ãITå Žã«ãããå°éç¥èãšæè¡åã蚌æããããã®è©Šéšã§ããåºæ¬æ å ±æè¡è è©Šéšãšæ¯ã¹ããšãããå°éçã§æ·±ãç¥èãæ±ããããŸãããã®ãããäžå®ã®ç¥èãšçµéšãæã€æè¡è ããšã³ãžãã¢ãã¡ãåéšãç®æãããšãå€ãã§ãã
è©Šéšã¯ãåºé¡ç¯å²ãéåžžã«å¹ åºããCèšèªã®ç¥èã ãã§ãªããããŒã¿ããŒã¹ããããã¯ãŒã¯ãã¢ã«ãŽãªãºã ãªã©å€æ¹é¢ã«ãããåé¡ãåºé¡ãããŸãããã®ãããããããã®åéãæ·±ãç解ããå¿çšããèœåãæ±ããããŸãã
4.3 Cããã°ã©ãã³ã°èœåèªå®è©Šéšã®å 容
Cããã°ã©ãã³ã°èœåèªå®è©Šéšã¯ãCèšèªã«ç¹åããã¹ãã«ãèªå®ããããã®è©Šéšã§ããè©Šéšã®å 容ã¯äž»ã«ãCèšèªã®ææ³ãããã°ã©ã ã®èšèšã»äœæããããŠãããã°ã«ã€ããŠåãããŸãã
ã¬ãã«ã¯ããã³ãºãã·ã«ããŒããŽãŒã«ãã®äžã€ããããããããã®ã¬ãã«ã«å¿ããç¥èãšæè¡ãåãããŸãããã®è³æ Œã¯ãCèšèªã«ããããã°ã©ãã³ã°ã¹ãã«ããããçšããåé¡è§£æ±ºèœåã蚌æãããã®ã§ãããCèšèªã掻çšããéçºãè¡ããšã³ãžãã¢ããèªèº«ã®Cèšèªã¹ãã«ã蚌æãããæ¹ã ã«æšå¥šãããŸãã
5. è³æ ŒååŸã®ããã®å匷æ³
æ°ããªè©Šéšãžã®ææŠã¯ãæ £ããªãããšã§ããã«æžæã£ãŠããŸããã®ã§ããããããé©åãªåŠç¿æ³ã身ã«ã€ããã°ãè©Šéšã«åããæºåãæ Œæ®µã«æ¥œã«ãªããŸããç§ãã¡ã¯ãããªããCèšèªã®è³æ Œè©Šéšã«çå£ã«æãããã®æé©ãªå匷æ³ãã玹ä»ããŸãã
5.1 åºæ¬çãªå匷æ³
ç解ãšèšæ¶ã®ãã©ã³ã¹ã倧åã§ããç解ããã ãã§ãªããåŸãç¥èãèšæ¶ã«å®çãããå¿ èŠããããŸãããã®ããããåŒã³æ°Žãã®ãããªçæéã®å匷ãæ¥èª²ã«ããããšã§ãç¥èãå®çãããããšãå¯èœã§ãã
é©åãªäºç¿ãšåŸ©ç¿ãäžå¯æ¬ ã§ãäºç¿ãããåŠç¿å¹çã倧ããå·Šå³ããŸãã次ã«åŠç¿ããå 容ãäºåã«äžèªããåŠç¿ã®ç®çãçŠç¹ãæ確ã«ããŸãããããŸã埩ç¿ã¯ãåŠç¿å 容ãèšæ¶ã«å®çãããããã®éèŠãªããã»ã¹ã§ãã
5.2 å¹æçãªããã¹ã掻çšæ³
ç§ãã¡ã¯ãååãå人ããã®å§ããå ã«ããã¹ããéžãã ããCèšèªã®å匷ã§è©å€ã®ããããã¹ããéžã¶ãããããŸããããèªåã®åŠç¿ã¹ã¿ã€ã«ã«åã£ãããã¹ããéžã¶ããšãæãéèŠã§ãã
ããã¹ãå ã®å 容ãç解ããããããåç« ã®æåŸã«ãªãã©ã·ãŒãã¹ããç·Žç¿åé¡ãããããªã©ãèªåãç解ãæ·±ããåŠç¿ãé²ããã®ã«é©ãããã®ã§ããããšãèå¿ã§ããæŽã«ãåºç€ã®ææ³ããã³ãŒãã£ã³ã°ãŸã§ãå¹ åºãå 容ãã«ããŒããŠãããã®ãéžã³ãŸãããã
5.3 æš¡æ¬è©Šéšã®æŽ»çš
æš¡æ¬è©Šéšã¯ãèªåã®åŠç¿ç¶æ³ãææ¡ããã ãã§ãªããè©Šéšåœæ¥ã®ç·åŒµæãè©Šéšæé管çãªã©ãå®éã®è©Šéšç°å¢ãæ³å®ããèšç·Žã«ããªããŸããèªåãæãèŠæãšããé åãæé管çã§ã®èª²é¡ãææ¡ããããã«ããæš¡æ¬è©Šéšã®æŽ»çšããå§ãããŸãã
éå»åé¡ã«ãã©ã€ããããšã§ãè©Šéšã«é »ç¹ã«åºãåé¡ãåé¡ã®ãã¿ãŒã³ãææ¡ããå¹ççã«åŠç¿ãé²ããããšãå¯èœã«ãªããŸãããã¹ãçµæããã®ãã£ãŒãããã¯ãå ã«ãåŠç¿èšç»ã調æŽããããšãéèŠã§ãã
Cèšèªè³æ ŒååŸã«åããç·Žç¿åé¡
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åé¡1: ãHello, World!ããšè¡šç€ºããããã°ã©ã ãäœæããŠãã ããã åé¡2: intåã®å€æ°ãäºã€å®£èšããããããã«æ°å€ãä»£å ¥ããã®åŸããããã®å€æ°ã足ããŠè¡šç€ºããããã°ã©ã ãäœæããŠãã ããã åé¡3: 1ãã10ãŸã§ã®æ°ãé ã«è¡šç€ºããforã«ãŒããäœæããŠãã ããã
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åé¡1解ç: #includeint main(){ printf("Hello, World!"); return 0; } åé¡2解ç: #include int main(){ int a = 5; int b = 10; printf("çµæã¯: %d", a + b); return 0; } åé¡3解ç: #include int main(){ int i; for(i = 1; i <= 10 ; i++){ printf("%d ", i); } return 0; }
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åé¡1解ç: #includeint main(){ int n; printf("æ°å€ãå ¥åããŠãã ãã: "); scanf("%d",&n); if(n%2 == 0){ printf("%dã¯å¶æ°ã§ã",n); }else{ printf("%dã¯å¥æ°ã§ã",n); } return 0; } åé¡2解ç: //詳现ãªããã°ã©ã ã¯çç¥ããŸãããäºæ¬¡å é åã®åèŠçŽ ããããã足ãåãããããã°ã©ã ãšãªããŸãã åé¡3解ç: #include int fibonacci(int n){ if(n==0 || n==1){ return n; }else{ return (fibonacci(n-1) + fibonacci(n-2)); } } int main(){ int n; printf("æ°å€ãå ¥åããŠãã ãã: "); scanf("%d",&n); printf("%d", fibonacci(n)); return 0; }
7. è³æ ŒååŸã«å¿ èŠãªæéãšè²»çš
ããã§ã¯ãCèšèªã®è³æ ŒååŸã«å¿ èŠãªæéãšè²»çšã«ã€ããŠè©±ããŸãããããŸããå¿ èŠãªæéã¯äžäººäžäººç°ãªããŸããããããäžè¬çãªåèãŸã§ã«ãåå¿è ã0ããéå§ããŠCèšèªã®åºç€ãç解ããåé¡ã解決ã§ããã¬ãã«ã«éããã«ã¯ãçŽ3ã6ã«æçšåºŠãå¿ èŠãšèšãããŠããŸãã
7.1 å匷ã«ãããæé
ããã«è©³ããèšããšãæ¯æ¥1æéãã2æéãé±ã«5æ¥ã7æ¥å匷ãããšãã®æéãèŠèŸŒãããšãã§ããŸãããã ããããã¯ãããŸã§ç®å®ã§ãããåã ã®ç解åãäºåã®ããã°ã©ãã³ã°çµéšãªã©ã«ããå€åããŸãã
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7.2 è³æ ŒååŸè²»çš
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