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一、c 语言中字符数组和数字的相互转换函数; 相关函数：atof atoi，atol， strtod，strtol，strtoul 在头文件stdlib中 #include<stdlib.h> （1）atof (将字串转换成浮点型数) ascii to floating 的缩写 char *str 阅读全文
posted @ 2021-08-11 06:01
myrj
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#include<reg51.h> #define uchar unsigned char; #define uint unsigned int; uchar position; uchar tt,bz1=0,bz2=0,bz3=0; char buffer [3]; uint second,n; 阅读全文
posted @ 2021-08-10 22:06
myrj
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#include <stdio.h> int main() { int arr[] = {1,2,3,4,5}; int length = sizeof(arr)/sizeof(int); printf("%d\n",length); getchar(); } 阅读全文
posted @ 2021-08-10 16:18
myrj
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1.字符数组赋值：char c1[20] = "women"; 2。将数转为字符赋值给数组 #include <stdio.h> #include <cstdlib> #include <stdlib.h> int main() { char c1[20] = "women"; int num=10 阅读全文
posted @ 2021-08-10 15:32
myrj
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uchar code table1[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//0--9uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x 阅读全文
posted @ 2021-08-10 13:34
myrj
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#include<reg51.h> #define uchar unsigned char; #define uint unsigned int; uchar position; uchar tt,bz1=0,bz2=0,bz3=0; uint second; uchar minute; uchar 阅读全文
posted @ 2021-08-10 13:29
myrj
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#include<reg51.h> #define uchar unsigned char; #define uint unsigned int; uchar position; uchar tt,bz1=0,bz2=0,bz3=0; uchar second; uchar minute; ucha 阅读全文
posted @ 2021-08-10 13:06
myrj
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#include<reg51.h> #define uchar unsigned char; #define uint unsigned int; uchar position; uchar tt,bz1=0,bz2=0; uchar second; uchar minute; uchar hour 阅读全文
posted @ 2021-08-10 12:12
myrj
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uchar flag=0; void key() //按键判断程序 { if(key1==0) //判断是否按下键盘 { delay(10); //延时,软件去干扰 if(key1==0) //确认按键按下 { flag=1 } while(key1==0); } if(key2==0) //判断是 阅读全文
posted @ 2021-08-10 08:30
myrj
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