C語(yǔ)言程序設(shè)計(jì)(第二)2

1、哈爾濱工業(yè)大學(xué)哈爾濱工業(yè)大學(xué)計(jì)算機(jī)科學(xué)與技術(shù)學(xué)院計(jì)算機(jī)科學(xué)與技術(shù)學(xué)院蘇小紅蘇小紅2022-2-102/262022-2-103/262022-2-104/26#include /*函數(shù)功能函數(shù)功能：計(jì)算兩個(gè)整數(shù)相加之和計(jì)算兩個(gè)整數(shù)相加之和 入口參數(shù)入口參數(shù)：整型數(shù)據(jù)整型數(shù)據(jù)a和和b 返回值：返回值： 整型數(shù)整型數(shù)a和和b之和之和*/int Add(int a, int b)return (a + b);/*主函數(shù)主函數(shù)*/main()int x, y, sum = 0;printf(Input two integers:);scanf(%d%d, &x, &y); /*輸入兩個(gè)

2、整型數(shù)輸入兩個(gè)整型數(shù)x和和y*/sum = Add(x, y); /*調(diào)用函數(shù)調(diào)用函數(shù)Add計(jì)算計(jì)算x和和y相加之和相加之和*/printf(sum = %dn, sum); /*輸出輸出x和和y相加之和相加之和*/ 并列的兩個(gè)函數(shù)并列的兩個(gè)函數(shù)其中主函數(shù)是其中主函數(shù)是程序的入口程序的入口程序注釋程序注釋編譯預(yù)處理命令編譯預(yù)處理命令2022-2-105/262022-2-106/262022-2-107/26如如 如如 如如 如如 長(zhǎng)整型長(zhǎng)整型無(wú)符號(hào)整型無(wú)符號(hào)整型 八進(jìn)制八進(jìn)制十六進(jìn)制十六進(jìn)制單精度實(shí)型單精度實(shí)型長(zhǎng)雙精度實(shí)型長(zhǎng)雙精度實(shí)型十進(jìn)制小數(shù)十進(jìn)制小數(shù)指數(shù)形式指數(shù)形式十進(jìn)制十進(jìn)制2022-

3、2-108/262022-2-109/262022-2-1010/26結(jié)果會(huì)是什么？結(jié)果會(huì)是什么？2022-2-1011/26運(yùn)算規(guī)則：運(yùn)算規(guī)則： 語(yǔ)法：語(yǔ)法： 規(guī)則：規(guī)則： 左值和右值類型一致左值和右值類型一致Valid Example:Invalid Example:int x; int y;x = 12;y = 5.75;2022-2-1012/262022-2-1013/26數(shù)據(jù)類型數(shù)據(jù)類型基本類型基本類型構(gòu)造類型構(gòu)造類型指針類型指針類型無(wú)類型無(wú)類型整型整型實(shí)型（浮點(diǎn)型）實(shí)型（浮點(diǎn)型）字符型字符型枚舉類型枚舉類型數(shù)組類型數(shù)組類型結(jié)構(gòu)體類型結(jié)構(gòu)體類型共用體類型共用體類型單精度實(shí)型雙精度實(shí)

4、型基本整型長(zhǎng)整型短整型無(wú)符號(hào)整型長(zhǎng)雙精度實(shí)型2022-2-1014/262022-2-1015/262022-2-1016/262022-2-1017/26Most significant bit (MSB) is sign(最高位為符號(hào)位最高位為符號(hào)位)2022-2-1018/26英文稱謂中文稱謂換算方法bit(b)位（比特）Byte(B)字節(jié)1 B = 8 bKilobyte(KB)K1 KB = 1,024 BMegabyte(MB)兆1 MB = 1,024 KBGigabyte(GB)G1 GB = 1,024 MBTerabyte(TB)T1 TB = 1,024 GB2022-2

5、-1019/262022-2-1020/262022-2-1021/262022-2-1022/26#include main()printf(Data type Number of bytesn);printf(- -n);printf(char %dn, sizeof(char);printf(int %dn, sizeof(int);printf(short int %dn, sizeof(short);printf(long int %dn, sizeof(long);printf(float %dn, sizeof(float);printf(double %dn, sizeof(double);2022-2-1023/262022-2-1024/262022-2-1025/26Example:int