c語言中的數據類型
"數據類型": {
"基本數據類型":{
//%d 以整數型輸出
"整型":{
//int 4字節 -2147483648~2147483647
"帶符號整型":{
"帶符號整型", signed [int] 4字節 -2147483648~2147483647
"帶符號短整型", signed short [int] 2
"帶符號長整型" signed long [int] 4
},
"無符號整型":{
"無符號整型", unsigned [int] 4
"無符號短整型", unsigned short [int] 4
"無符號長整型" unsigned long [int] 4
}
},
"實數型":{
"單精度型", float 4 有效數字:6~7
"雙精度型", double 8 15~16
"長雙精度" long double 16 18~19
},
"字符串":{},
"字符型":{ %c 以字符型輸出
//在c中,字符具有數值性質,帶符號字符和無符號字符能夠參與到整型數據的運算中
//字符參與運算相當於對字符的ASCII碼值進行運算
字節數
"字符型", char 1 -128~127
"帶符號字符型", signed char 1 -128~127
"無符號字符型" unsigned char 1 0~255
字符型常量:由一堆對單引號括起來的單個字符,
//字符常量的值爲該字符的ASCII碼值,小寫字符值小於大寫字符值
轉義字符:
}
},
"構造型": {
"數組型",
"結構型",
"共用型",
"枚舉型"
},
"指針類型": {},
"空類型": {}
}