c语言中怎么输入字母输出成数字 c语言中实现输入一个数字字符,然后转换成整数数字输出.怎么做...
c\u8bed\u8a00 \u4e3a\u4ec0\u4e48\u8f93\u5165\u5b57\u6bcd\u8f93\u51fa\u7684\u662f\u6570\u5b57\u4e00\u3001\u8f93\u5165\u6570\u5b57\u53ef\u4ee5\u7528scanf\u8f93\u5165\u3002
\u5982\u679c\u8f93\u5165\u7684\u662f\u6574\u578b\u6570\u636e\uff0c\u53ef\u4ee5\u7528
int a;
scanf("%d",&a);
\u5b9e\u73b0\u628a\u8f93\u5165\u7684\u6570\u5b57\u8d4b\u503c\u7ed9a\u7684\u6548\u679c\u3002
\u7c7b\u4f3c\u7684\uff0c\u5982\u679c\u662ffloat, double,short,long\u7b49\u7c7b\u578b\u7684\u6570\u636e\uff0c\u90a3\u4e48\u5c31\u8981\u628a\u53d8\u91cf\u5b9a\u4e49\u6210\u5bf9\u5e94\u7684\u7c7b\u578b\uff0c\u7136\u540e\u4f7f\u7528\u5404\u81ea\u7684\u683c\u5f0f\u5b57\u7b26%f,%lf,%hd,%ld\u7b49\u8fdb\u884c\u8f93\u5165\u3002
\u4e8c\u3001\u8f93\u5165\u5355\u4e2a\u5b57\u7b26\u3002
\u8f93\u5165\u5355\u4e2a\u5b57\u7b26\u53ef\u4ee5\u7528\u4ee5\u4e0b\u4e24\u79cd\u51fd\u6570\u3002
\u5b9a\u4e49char c;
1 scanf("%c", &c);
\u8fd9\u79cd\u65b9\u6cd5\u548c\u8f93\u5165\u6570\u5b57\u662f\u7c7b\u4f3c\u7684\uff0c%c\u4ec5\u8bfb\u5165\u4e00\u4e2a\u5b57\u7b26\uff0c\u5e76\u8d4b\u503c\u7ed9c\u3002
2 c = getchar();
getchar\u51fd\u6570\u7684\u529f\u80fd\u5c31\u662f\u8bfb\u5165\u4e00\u4e2a\u5b57\u7b26\uff0c\u5e76\u4ee5\u8fd4\u56de\u503c\u5f62\u5f0f\u8fd4\u56de\u3002
\u4e09\u3001\u8f93\u5165\u4e00\u4e32\u5b57\u7b26(\u4ee5\u7a7a\u767d\u5b57\u7b26\u5206\u9694)\u3002
\u53ef\u4ee5\u7528scanf\u7684%s\u683c\u5f0f\u3002
char str[100];//\u7a7a\u95f4\u8981\u5b9a\u4e49\u8db3\u591f\u5927
scanf("%s", str);//\u5c06\u5b57\u7b26\u4e32\u8bfb\u5165\u5e76\u5b58\u5728str\u4e2d
\u56db\uff0c\u8bfb\u5165\u4e00\u884c\u6570\u636e\u3002
\u53ef\u4ee5\u7528gets\u51fd\u6570\u3002gets\u7684\u529f\u80fd\u5c31\u662f\u8bfb\u5165\u4e00\u6574\u884c\u6570\u636e\uff0c\u4ee5\u6362\u884c\u7b26\u4e3a\u7ed3\u675f\u3002
char str[100];//\u540c\u6837\u8981\u8db3\u591f\u5927\u7684\u7a7a\u95f4
gets(str);
\u8865\u5145\uff0c\u65e0\u8bba\u54ea\u79cd\u5f62\u5f0f\u7684\u8f93\u5165\uff0c\u90fd\u53ef\u4ee5\u7528getchar\u9010\u4e2a\u8f93\u5165\u5230\u5b57\u7b26\u4e32\u4e2d\uff0c\u7136\u540e\u5224\u65ad\u7ed3\u675f\u7b26\u4ee5\u7ed3\u675f\u8f93\u5165\uff0c\u518d\u5bf9\u5b57\u7b26\u4e32\u505a\u5904\u7406\u3002\u8fd9\u79cd\u65b9\u6cd5\u5bf9\u7f16\u7a0b\u6c34\u5e73\u8981\u6c42\u6bd4\u524d\u51e0\u79cd\u7565\u9ad8\uff0c\u4ee3\u7801\u91cf\u4e5f\u66f4\u5927\uff0c\u4f46\u597d\u5904\u662f\u5b8c\u5168\u81ea\u5df1\u63a7\u5236\uff0c\u66f4\u52a0\u7075\u6d3b\u3002
\u5b57\u7b26\u4e32\u8f6c\u6574\u6570\u53ef\u4ee5\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a
1.\u4f7f\u7528c\u8bed\u8a00\u81ea\u5e26\u7684\u5e93\u51fd\u6570\uff1aatoi\u3002
\u51fd\u6570\u539f\u578b\uff1aint atoi(const char *nptr);
\u529f\u80fd\uff1a\u628a\u5b57\u7b26\u4e32\u8f6c\u6210\u6574\u578b\u6570\u3002
\u4f8b\u5982\uff1a
#include #include int main(void){ int n; char *str = "12345"; n = atoi(str); printf("int=%d\n",n); return 0;}/*\u8f93\u51fa\uff1aint = 12345*/2.\u53ef\u4ee5\u81ea\u5df1\u7f16\u5199\u4e00\u4e2a\u8f6c\u6362\u51fd\u6570\uff1a
#include #include int atoi(char *s){int t=0;while(*s){t=t*10+*s-'0';s++;}return(t);}int main (){char a[]="12345";int n = atoi(a);printf("n=%d ",n);return 0;}/*\u8f93\u51fa\uff1an = 12345*/
{
char c;
scanf("%c", &c);
printf("%d", c);
}
绛旓細include <stdio.h>main(){char ch;ch =getchar();printf("%d\n",(ch>='a' && ch<='z')?(ch-'a'+1):(ch>='A' && ch<='Z')?(ch-'A'+1):NULL);}A1Press any key to continue鎬庝箞 锛 璺熶綘瑕佹眰涓嶄竴鏍凤紵
绛旓細ch[i] = 1; break; } } //sscanf(ch, "%d", &i); //濡傛灉鏈鍚庝綘鎶婃墍鏈瀛楁瘝閮鍙樻垚鏁板瓧, 鐒跺悗灏卞彲浠ョ敤杩欎釜搴撳嚱鏁 //鎶婅繖涓瓧绗︿覆閲岀殑鏁板瓧瀛楃鍙樻垚涓涓暣鍨嬪彉閲. return 0;}杩欎笢瑗垮彧鑳戒綘鑷繁涓涓竴涓垽鏂, 鐒跺悗鏇挎崲....
绛旓細鐢ㄥ嚱鏁板彲浠ョ敤atoi锛岃鑷繁绠楃殑璇濆彲浠ユ妸瀛楁瘝 - '0'鎴栧瓧姣 - 48锛屽锛'3' - '0'鎴'3' - 48
绛旓細include <stdio.h> int main(void) { char ch = 'A';printf("鎴戦潬锛宑h鐨勫兼槸:%c",ch);return 1;}
绛旓細涓嶉渶瑕佽浆鎹紝ASCII瀛楃鍦C璇█閲灏辨槸鏁存暟0-127鐨勫彟澶栦竴绉嶅啓娉曡屽凡銆傜洿鎺ヤ互鏁板瓧褰㈠紡杈撳嚭灏辫浜嗭紝姣斿 char c='A';printf("%d",c);//浠10杩涘埗鏁存暟杈撳嚭c
绛旓細寰堥珮鍏村洖绛斾綘鐨勯棶棰樸傚湪C璇█涓浣跨敤ACSII琛ㄧず瀛楁瘝鐨勶紝A-Z鐨凙SCII鐮佹槸椤哄簭鐨勶紝涔熷氨鏄疊姣擜澶т竴锛孋姣擝澶т竴銆傝繖鏍风殑璇漐-A=25銆傛墍浠ラ渶瑕佽〃绀虹殑鏃跺欏氨鏄兂瑕佽浆鎹㈢殑瀛楁瘝鍑忓幓A锛屽啀鍔犱竴銆傛瘮濡杈撳叆浜咮锛歝har x=鈥楤鈥欙紱int i='B'-'A鈥+1锛涜繖鏍穒鐨勫煎氨鏄2锛杈撳嚭灏卞彲浠ヤ簡銆傚笇鏈涘浣犳湁甯姪銆
绛旓細瀛楃涓茶浆鏁板瓧,int float绫诲瀷 鍚岀悊 浜屻佷娇鐢╯printf()鍑芥暟 char str[10]; int a=1234321;sprintf(str,鈥%d鈥,a);char str[10]; double a=123.321;sprintf(str,鈥%.3lf鈥,a);char str[10]; int a=175;sprintf(str,鈥%x鈥,a);//10杩涘埗杞崲鎴16杩涘埗锛屽鏋杈撳嚭澶у啓鐨勫瓧姣鏄痵printf(str,...
绛旓細鈫 +**abc*cd (a+b)*((c-d)*e+f)鈫 +ab+*-cdef 涓婇潰鏄尝鍏板紡锛岄嗘尝鍏板紡濡備笅:a*b*c 鈫 ab*c a*b*c+c*d 鈫 ab*c*cd*+ (a+b)*((c-d)*e+f)鈫 ab+cd-e*f+ 鍐欏嚭(a+b)*((c-d)*e+f)杞崲鏃舵爤鐨勫彉鍖栨儏鍐:銆愭敞鎰忥紝鍙崇涓烘爤椤躲戣鍏(锛屽叆鏍堬紝鏍堜腑涓(锛杈撳嚭:...
绛旓細绫讳技鐨勶紝濡傛灉鏄痜loat, double,short,long绛夌被鍨嬬殑鏁版嵁锛岄偅涔堝氨瑕佹妸鍙橀噺瀹氫箟鎴愬搴旂殑绫诲瀷锛岀劧鍚庝娇鐢ㄥ悇鑷殑鏍煎紡瀛楃%f,%lf,%hd,%ld绛夎繘琛岃緭鍏ャ備簩銆佽緭鍏ュ崟涓瓧绗︺傝緭鍏ュ崟涓瓧绗﹀彲浠ョ敤浠ヤ笅涓ょ鍑芥暟銆傚畾涔塩har c;1 scanf("%c", &c);杩欑鏂规硶鍜杈撳叆鏁板瓧鏄被浼肩殑锛%c浠呰鍏ヤ竴涓瓧绗︼紝骞惰祴鍊肩粰c銆2 c =...
绛旓細include <stdio.h>#define N 50char char2int(char ch){//杞崲鍑芥暟 char r; switch(ch){ case 'A': case 'B': case 'C':r='2';break;//涓轰簡鍑忓皯缁撴灉鐨勫垽鏂紝鐩存帴灏嗘暟瀛楄浆鎹鎴愭暟瀛瀛楃 case 'D': case 'E': case 'F':r='3';break; case 'G': ...
