整型(int,long)各能容纳多长的数据？精度(float,double)的呢？ 什么是 int double float long 等等！ ...
C\u8bed\u8a00\u4e2d\u6574\u578b\u53d8\u91cf\uff08int\uff09\u5b9e\u578b\u53d8\u91cf\uff08float\uff09\u53cc\u7cbe\u5ea6\u53d8\u91cf\uff08double\uff09\u5230\u5e95\u662f\u4ec0\u4e48\u4e1c\u897f\uff1f\u6709\u4ec0\u4e48\u533a\u6574\u578b[signed]int -2147483648~+2147483648
\u65e0\u7b26\u53f7\u6574\u578bunsigned[int] 0~4294967295
\u77ed\u6574\u578b short [int] -32768~32768
\u65e0\u7b26\u53f7\u77ed\u6574\u578bunsigned short[int] 0~65535
\u957f\u6574\u578b Long int -2147483648~+2147483648
\u65e0\u7b26\u53f7\u957f\u6574\u578bunsigned [int] 0~4294967295
\u5b57\u7b26\u578b[signed] char -128~+127
\u65e0\u7b26\u53f7\u5b57\u7b26\u578b unsigned char 0~255
\u5355\u7cbe\u5ea6 float 3.4 x 10^\uff08-38\uff09~ 3.4 x 10^\uff08+38\uff09
\u53cc\u7cbe\u5ea6double 1.7 x 10^\uff08-308\uff09~ 1.7 x 10^\uff08+308\uff09
\u957f\u53cc\u7cbe\u5ea6 long double 1.7 x 10^\uff08-308\uff09~ 1.7 x 10^\uff08+308\uff09
\u7b80\u5355\u7684\u4e3e\u4e2a\u4f8b\u5b50 \u65b9\u4fbf\u7406\u89e3
\u6bd4\u65b9\u8bf4 \u8f93\u5165\u4e00\u4e2a10\u8fdb\u5236 \u6570\u503c 24 \u90a3\u6211\u9009\u7528 char \u7c7b\u578b\u5c31\u53ef\u4ee5\u4e86 \u5c31\u591f\u7528\u4e86 \u6ca1\u6709\u5fc5\u8981 \u4f7f\u7528 \u66f4\u5927\u7684\u6570\u636e\u7c7b\u8bcd\u80fd\u591f double\u7c7b\u578b\uff08\u6d6a\u8d39\uff09 \u8981\u662f\u6211\u7684\u6570\u503c \u662f 24000 \u90a3\u6211\u5c31\u9009\u7528 int\u7c7b\u578b\uff08\u65e0\u7b26\u53f7\uff09\u7684 \u4ed6\u7684\u6700\u5927\u8303\u56f4\u662f 65536 \u8981\u662f\u6211\u7528\u5e26\u5c0f\u6570\u70b9\u7684 \u5c31\u5bfb\u7528 float \u6216\u8005 double
\u8fd9\u53ea\u662f \u7b80\u5355\u7684 \u8bf4\u4e00\u4e0b \u5177\u4f53\u7684 \u4f60\u8981\u770b\u4e66 \u6216\u76f8\u5173\u8d44\u6599 \u8fdb\u4e00\u6b65\u7684 \u7406\u89e3\u638c\u63e1
int \u548c long \u7528\u6765\u5b58\u50a8\u6709\u7b26\u53f7\u6574\u6570\uff0cC++\u6807\u51c6\u89c4\u5b9a long \u7684\u8868\u793a\u8303\u56f4 \u5927\u4e8e\u6216\u7b49\u4e8eint\u7684\u8868\u793a\u8303\u56f4\u3002
\u81f3\u4e8eint\u4e0elong\u5177\u4f53\u80fd\u8868\u793a\u591a\u5927\u8303\u56f4\uff0c\u662f\u6839\u636e\u5e73\u53f0\u51b3\u5b9a\u7684\u3002\u5728Windows\u5e73\u53f0\u4e0b\uff0cint\u4e0elong\u90fd\u662f4Byte\u7684\u3002
float\u4e0edouble \u7528\u6765\u5b58\u50a8\u6709\u7b26\u53f7\u5c0f\u6570\uff0c\u524d\u8005\u662f\u5355\u7cbe\u5ea6\uff0c\u540e\u8005\u662f\u53cc\u7cbe\u5ea6\u3002\u5f53\u7136\u7cbe\u4e49\u8d8a\u9ad8\u80fd\u8868\u793a\u7684\u6709\u6548\u4f4d\u6570\u5c31\u66f4\u591a\u3002\u5728Windows\u5e73\u53f0\u4e0b\uff0cfloat\u662f4Byte\u7684\uff0c\u7cbe\u5ea6\u5927\u81f4\u67097\u4f4d\uff0cdouble\u662f8Byte\u7684\uff0c\u7cbe\u5ea6\u5927\u81f4\u670915\u4f4d\u3002\u5982\u679c\u60f3\u4e86\u89e3\u4f55\u4e3a\u6d6e\u70b9\u6570\u53ca\u5176\u7ec6\u8282\uff0c\u8bf7\u53c2\u8003IEEE754\u6807\u51c6\u3002
float 32 6-7 -3.4*10(-38)～3.4*10(38)
double 64 15-16 -1.7*10(-308)～1.7*10(308)
long double 128 18-19 -1.2*10(-4932)～1.2*10(4932)
int long -2147483648～2147483647
int -32768--32767
long -2147483648--2147483647
float 6-7位
double 15-16位
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绛旓細閫氳繃涓嬮潰鐨勮〃鏍兼垜浠簡瑙ｄ笅int銆long鐨勫惈涔夈佸彂闊冲拰鐢ㄦ硶 鎺ヤ笅鏉ユ垜浠瑙ｅ嚑涓敤渚嬶紝甯屾湜杩欎簺鐢ㄤ緥鍙互鍔犳繁鎮ㄧ殑鐞嗚В 🚀🚀🚀int锛欴eclare an integer variable (澹版槑鏁村瀷鍙橀噺)Function returns an integer type (鍑芥暟杩斿洖鏁存暟绫诲瀷)Perform integer arithmetic (杩涜鏁存暟杩愮畻)❗❗...
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绛旓細32767銆3銆侀暱鏁村瀷鍒欎负-2147483648~2147483647銆備緥濡傦紝濡傛灉鏈変釜鏁颁负32780锛岄偅涔堝畠鍙兘鐢ㄩ暱鏁村瀷琛ㄧず锛岃屼笉鑳界敤鐭暣鍨嬭〃绀恒4銆侀暱鏁村瀷鏄▼搴忚璁′腑鏁版嵁绫诲瀷鐨勪竴绉嶈〃鐜版柟寮忥紝閫氬父鐢╨ong 琛ㄧず闀鏁村瀷锛宭ong 鏈夌鍙64浣鏁存暟 鑼冨洿鏄-2^63-2^63 -1 Int64unsigned long 鏃犵鍙64浣嶆暣鏁 0-2^64-1 UInt64銆
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