用C语言编程：从键盘输入一个英文大写字母，输出其对应的小写字母以及小写字母对应的ASCII码值。 C语言编程题：从键盘输入一个小写字母，在屏幕上显示其对应的大...
\u7528C\u8bed\u8a00\u7f16\u7a0b \u901a\u8fc7\u952e\u76d8\u8f93\u5165\u4e00\u4e2a\u5c0f\u5199\u5b57\u6bcd,\u8981\u6c42\u5c06\u5176\u8f6c\u5316\u4e3a\u5bf9\u5e94\u7684\u5927\u5199\u5b57\u6bcd\u540e\u8f93\u51fa#include
void main(){
char word;
scanf("%c",&word);
a-=32;
printf("%c\n",word);
}
ASCII \u7801\u4f7f\u7528\u6307\u5b9a\u76847 \u4f4d\u62168 \u4f4d\u4e8c\u8fdb\u5236\u6570\u7ec4\u5408\u6765\u8868\u793a128 \u6216256 \u79cd\u53ef\u80fd\u7684\u5b57\u7b26\u3002\u6807\u51c6ASCII \u7801\u4e5f\u53eb\u57fa\u7840ASCII\u7801\uff0c\u4f7f\u75287 \u4f4d\u4e8c\u8fdb\u5236\u6570\uff08\u5269\u4e0b\u76841\u4f4d\u4e8c\u8fdb\u5236\u4e3a0\uff09\u6765\u8868\u793a\u6240\u6709\u7684\u5927\u5199\u548c\u5c0f\u5199\u5b57\u6bcd\uff0c\u6570\u5b570 \u52309\u3001\u6807\u70b9\u7b26\u53f7\uff0c \u4ee5\u53ca\u5728\u7f8e\u5f0f\u82f1\u8bed\u4e2d\u4f7f\u7528\u7684\u7279\u6b8a\u63a7\u5236\u5b57\u7b26\u3002\u5176\u4e2d\uff1a
0\uff5e31\u53ca127(\u517133\u4e2a)\u662f\u63a7\u5236\u5b57\u7b26\u6216\u901a\u4fe1\u4e13\u7528\u5b57\u7b26\uff08\u5176\u4f59\u4e3a\u53ef\u663e\u793a\u5b57\u7b26\uff09\uff0c\u5982\u63a7\u5236\u7b26\uff1aLF\uff08\u6362\u884c\uff09\u3001CR\uff08\u56de\u8f66\uff09\u3001FF\uff08\u6362\u9875\uff09\u3001DEL\uff08\u5220\u9664\uff09\u3001BS\uff08\u9000\u683c)\u3001BEL\uff08\u54cd\u94c3\uff09\u7b49\uff1b
\u901a\u4fe1\u4e13\u7528\u5b57\u7b26\uff1aSOH\uff08\u6587\u5934\uff09\u3001EOT\uff08\u6587\u5c3e\uff09\u3001ACK\uff08\u786e\u8ba4\uff09\u7b49\uff1bASCII\u503c\u4e3a8\u30019\u300110 \u548c13 \u5206\u522b\u8f6c\u6362\u4e3a\u9000\u683c\u3001\u5236\u8868\u3001\u6362\u884c\u548c\u56de\u8f66\u5b57\u7b26\u3002\u5b83\u4eec\u5e76\u6ca1\u6709\u7279\u5b9a\u7684\u56fe\u5f62\u663e\u793a\uff0c\u4f46\u4f1a\u4f9d\u4e0d\u540c\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u800c\u5bf9\u6587\u672c\u663e\u793a\u6709\u4e0d\u540c\u7684\u5f71\u54cd\u3002
32\uff5e126(\u517195\u4e2a)\u662f\u5b57\u7b26(32\u662f\u7a7a\u683c\uff09\uff0c\u5176\u4e2d48\uff5e57\u4e3a0\u52309\u5341\u4e2a\u963f\u62c9\u4f2f\u6570\u5b57\u3002
65\uff5e90\u4e3a26\u4e2a\u5927\u5199\u82f1\u6587\u5b57\u6bcd\uff0c97\uff5e122\u53f7\u4e3a26\u4e2a\u5c0f\u5199\u82f1\u6587\u5b57\u6bcd\uff0c\u5176\u4f59\u4e3a\u4e00\u4e9b\u6807\u70b9\u7b26\u53f7\u3001\u8fd0\u7b97\u7b26\u53f7\u7b49\u3002
\u6839\u636eASCII\u6807\u51c6\u8868\u53ef\u770b\u51fa\u540c\u4e00\u5b57\u6bcd\u7684\u5927\u5199\u548c\u5c0f\u5199\u4e4b\u95f4\u76f8\u5dee32\u3002
\u6269\u5c55\u8d44\u6599\uff1a
1. 1981\u5e74IBM PC ROM256\u4e2a\u5b57\u7b26\u7684\u5b57\u7b26\u96c6\uff0c\u5373IBM\u6269\u5c55\u5b57\u7b26\u96c6\u3002
2. 1985\u5e7411 Windows\u5b57\u7b26\u96c6\u88ab\u79f0\u4f5c\u201cANSI\u5b57\u7b26\u96c6\u201d\uff0c\u9075\u5faa\u4e86ANSI\u8349\u6848\u548cISO\u6807\u51c6\uff08ANSI/ISO8859-1-1987\uff0c\u7b80\u201cLatin 1\u201d\u3002
3. 1987\u5e744\u6708\u4ee3\u7801\u9875437,\u5b57\u7b26\u7684\u6620\u50cf\u4ee3\u7801\uff0c\u5728MS-DOS3.3\u51fa\u73b0\u3002
\u6269\u5c55ASCII \u5b57\u7b26\u662f\u4ece128 \u5230255\uff080x80-0xff\uff09\u7684\u5b57\u7b26\u3002
\u6269\u5c55ASCII\u4e0d\u518d\u662f\u56fd\u9645\u6807\u51c6\u3002
4. \u53cc\u5b57\u8282\u5b57\u7b26\u96c6\uff08DBCS\uff1adouble-byte character set\uff09,\u89e3\u51b3\u4e2d\u56fd\u3001\u65e5\u672c\u548c\u97e9\u56fd\u7684\u8c61\u5f62\u6587\u5b57\u7b26\u548cASCII\u7684\u67d0\u79cd\u517c\u5bb9\u6027\u3002DBCS\u4ece256\u4ee3\u7801\u5f00\u59cb\uff0c\u5c31\u50cfASCII\u4e00\u6837\u3002
\u4e0e\u4efb\u4f55\u884c\u4e3a\u826f\u597d\u7684\u4ee3\u7801\u9875\u4e00\u6837\uff0c\u6700\u521d\u7684128\u4e2a\u4ee3\u7801\u662fASCII\u3002\u7136\u800c\uff0c\u8f83\u9ad8\u7684128\u4e2a\u4ee3\u7801\u4e2d\u7684\u67d0\u4e9b\u603b\u662f\u8ddf\u968f\u7740\u7b2c\u4e8c\u4e2a\u5b57\u8282\u3002\u8fd9\u4e24\u4e2a\u5b57\u8282\u4e00\u8d77\uff08\u79f0\u4f5c\u9996\u5b57\u8282\u548c\u8ddf\u968f\u5b57\u8282\uff09\u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\uff0c\u901a\u5e38\u662f\u4e00\u4e2a\u590d\u6742\u7684\u8c61\u5f62\u6587\u5b57\u3002
\u53c2\u8003\u8d44\u6599\uff1aASCII
\u3010C\u8bed\u8a00\u8f93\u5165\u5c0f\u5199\u5b57\u6bcd\uff0c\u8f93\u51fa\u663e\u793a\u4e3a\u5927\u5199\u5b57\u6bcd\u4e3b\u8981\u7528\u5230\u5b57\u7b26\u3011
\u4f8b\u5b50\u5982\u4e0b\uff1a
\u76f4\u63a5\u7f16\u8bd1\uff0c\u7a0b\u5e8f\u8f93\u51fa\u7ed3\u679c\u4e2d\u8f93\u5165\u4efb\u610f\u5c0f\u5199\u5b57\u6bcd\uff0c\u6309\u56de\u8f66\uff0c\u5f97\u5230\u7ed3\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff1a
\u6269\u5c55\u8d44\u6599\uff08C\u7f16\u7a0b\u6ce8\u610f\u4e8b\u9879\uff09\uff1a1. \u6bcf\u4e2a\u7a0b\u5e8f\u4e2d\u4e00\u5b9a\u5305\u542bmain()\u51fd\u6570, \u5c3d\u7ba1C\u8bed\u8a00\u4e2d\u5bf9\u51fd\u6570\u547d\u540d\u6ca1\u6709\u9650\u5236.
2. printf\u51fd\u6570\u6c38\u8fdc\u4e0d\u4f1a\u81ea\u52a8\u6362\u884c,\u53ea\u80fd\u7528\n\u6765\u5b9e\u73b0, \u56de\u8f66\u952e\u8fdb\u884c\u7684\u6362\u884c\u5728\u7f16\u8bd1\u4e2d\u4f1a\u51fa\u73b0\u9519\u8bef\u4fe1\u606f.
3. \u5728vs2008\u4e2d\u7f16\u8bd1,\u6d4b\u8bd5\u9700\u8981\u52a0 system("pause"); \u6765\u6682\u505cdos\u81ea\u52a8\u9000\u51fa\u5bfc\u81f4\u7684printf\u65e0\u6cd5\u663e\u793a.
4. \u6240\u6709\u81ea\u5b9a\u4e49\u53d8\u91cf\u5fc5\u987b\u58f0\u660e\u624d\u80fd\u4f7f\u7528.
5. \u6bcf\u884c\u53ea\u4e66\u5199\u4e00\u6761\u8bed\u53e5,\u5728\u8fd0\u7b97\u7b26\u4e24\u8fb9\u52a0\u4e0a\u4e00\u4e2a\u7a7a\u683c,\u4fbf\u4e8e\u9605\u8bfb.
6. \u6574\u6570\u9664\u6cd5\u5c06\u81ea\u52a8\u820d\u4f4d,\u4e0d\u4f1a\u8fdb\u884c\u56db\u820d\u4e94\u5165\u7684\u64cd\u4f5c.
7. for(\u521d\u59cb\u5316\u90e8\u5206;\u6761\u4ef6\u90e8\u5206;\u589e\u957f\u90e8\u5206)\u6bd4while\u66f4\u9002\u7528\u4e8e\u521d\u59cb\u5316\u548c\u589e\u957f\u6b65\u957f\u90fd\u662f\u5355\u6761\u8bed\u53e5\u60c5\u51b5\u4e0b.
8. \u4f7f\u7528#define\u540d\u5b57\u66ff\u6362\u6587\u672c\u5bf9\u90e8\u5206"\u5e7b\u6570"\u8d4b\u4e88\u610f\u4e49\u4fbf\u4e8e\u9605\u8bfb#define\u7ed3\u5c3e\u4e0d\u9700\u8981;\u53f7\u7ed3\u675f.
#include<stdio.h>
int main()
{
char ch;
scanf("%c",&ch);//输入大写字母
printf("%c,%d",ch-('A'-'a'),ch-('A'-'a')); //输出.（'A-'a'）是ASC码表上大写与小写字母间的差值
//ch-('A'-'a')：大写转小写。输出ASC码，利用输出格式控制%d就可以自动转换输出了
return 0;
}
#include <stdio.h>
#include <stdlib.h>
int main()
{
char a; /*注释命名一个字符型变量a*/
printf("please input char:\n");/*屏幕显示输入a的值*/
a=getchar();/*在键盘上输入*/
a=a-32;/*'a'－'A'=32,取A的值*/
printf("%c,%d",a,a);/*输出%d格式下int型的值 A转化为十进制数值
}
#include<stdio.h>
int main()
{
char c = 0;
c= getchar();
printf("CHAR[%c] ASCII[%d]
",c+32,c);
return 0;
}
A
CHAR[a] ASCII[65]
Press any key to continue
1 输入合法性判断，2算出每个对应字母之间的差值，3 ascii码用%d格式
输出的时候是%d的格式转换符
绛旓細include<stdio.h> include<stdlib.h> int main(){ int strSize = 100;char *str = (char *)malloc(sizeof(char) * strSize);int charNum = 0;char input;//閫愪釜瀛楃杈撳叆瀛楃涓诧紝鍙互杈撳叆int鍙互琛ㄧず鐨勬渶澶у间釜瀛楃 printf("璇疯緭鍏ヤ换鎰忎釜瀛楃:\n");while(true){ scanf("%c",&input);...
绛旓細include <stdio.h>int main(void){ char str[256]; char *cp; printf("Input sentence:"); gets(str); for(cp = str; *cp != '\0'; cp++) { /* 鍒ゆ柇鍗曡瘝棣栧瓧姣嶆槸鍚︽槸澶у啓 */ if((cp == str || *(cp -1) == ' ') && *cp >= 'A' && *cp...
绛旓細涓銆佸叕寮1鑻卞昂=12鑻卞锛1鑻卞=2.54鍘樼背銆備簩銆佸畾涔変袱涓诞鐐规暟鍙橀噺琛ㄧず鑻卞昂鍜岃嫳瀵革紝杈撳叆鍚庯紝濂椾笂闈㈠叕寮忕畻鍗冲彲銆傛瘮濡傦細include<stdio.h> int main(){ float feet,inch,meter;printf("杈撳叆韬珮鑻卞昂 鑻卞锛");scanf("%f%f",&feet,&inch);meter=(feet*12+inch)*2.54*100;printf("杞崲鍚%f绫砛n...
绛旓細include<stdio.h>int main(){char a; printf("璇杈撳叆涓涓澶у啓鑻辫瀛楁瘝锛");scanf("%c",&a);printf("杞崲鎴愬皬鍐欏瓧姣嶄负%c",a+32);} 杩愯缁撴灉濡備笅锛
绛旓細include <stdio.h>int main() { char a; scanf("%c",&a); if (a >='a' && a<='z') { a = a-0x20; //澶у皬鍐欏瓧姣嶇浉宸0x20 printf("char=%c, ASCII value is %d\n",a,a); } return 0;}
绛旓細char c;int i,num=0,sum=0,word=0;//瀹氫箟word鐢ㄦ潵鎸囩ず涓涓鍗曡瘝鏄笉鏄粨鏉熸垨鏂板崟璇嶆槸鍚﹀紑濮;printf("璇浠庨敭鐩樿緭鍏涓琛岄渶瑕佹煡璇㈢殑鑻辨枃鍙ュ瓙锛岃繘琛屽崟璇嶆暟閲忕粺璁:\n\n");gets(string);//浠庨敭鐩樿幏寰楄緭鍏ョ殑瀛楃涓诧紱//浠ヤ笅缁熻鍙ュ瓙涓殑鑻辨枃瀛楃涓暟锛沠or(i=0;(c=string)!='\0';i++)//for寰幆...
绛旓細1銆侀鍏堢敤vs2017杞欢鏂板缓涓涓绌虹櫧鐨c璇█鏂囦欢锛屽紩鍏ュご鏂囦欢骞跺缓绔嬩富鍑芥暟锛屼富鍑芥暟涓厛瀹氫箟2涓猚har绫诲瀷鐨勫彉閲忥紝涓涓敤鏉ユ帴鏀剁敤鎴杈撳叆鐨勫瓧姣嶏紝鍙︿竴涓敤鏉ユ帴鏀跺鐞嗗悗鐨勭粨鏋滐細2銆佹帴鐫鍏堢敤getchar鍑芥暟灏嗙敤鎴疯緭鍏ョ殑瀛楃瀛樺叆鍙橀噺a涓幓锛岀劧鍚庣敤b鍔犱笂32鍗冲彲寰楀埌灏忓啓瀛楁瘝锛屽師鍥犲氨鏄敱浜庡ぇ鍐欏瓧姣嶄笌灏忓啓瀛楁瘝涔嬮棿鐨勫樊鍊...
绛旓細include <stdio.h>int split_str(char* str)//get the count of string{ int count = 1; int flag = 0; while(*str!='\0') { if(*str == ' ' && flag == 1) { count++; flag = 0; } else if(*str !=' ' && *str != '\0') { flag...
绛旓細i<'a'+26; i++){printf("%c : %d\n", (char) i, sign[i]);}//杈撳嚭绌烘牸i = 32;printf("Space : %d\n", sign[i]);//杈撳嚭鍥炶溅i = 10;printf("Enter : %d\n", sign[i]);//杈撳嚭鍏朵粬瀛楃for(i=0; i<256; i++){if(!(i>='0' && i<='9') && !(i>='A' &&...
绛旓細(1)绋嬪簭濡備笅:#include <stdio.h>void main(){int i=0,j=0;char c;printf("璇杈撳叆:\n");while((c=getchar())!='\n'){if(c=='a')i++;if(c=='E')j++;}printf("a: %d涓 E: %d涓猏n",i,j);}(2)绋嬪簭濡備笅:#include <stdio.h>#include <string.h>void main(){char a[30]="asd...
