c语言问题：盘输入一个仅由小写字母组成的字符串，输出以该串中任 取M个字母的所有排列及排列总数。 FORTRAN编程语言与C语言的区别是什么？
c\u8bed\u8a00\u4e2d?:\u548c!\u662f\u4ec0\u4e48\u610f\u601d\uff1f\u600e\u4e48\u8fd0\u7528\u5728\u7f16\u7a0b\u4e2d\uff1f?:\u7684\u610f\u601d\u662f\u6761\u4ef6\u8fd0\u7b97\u7b26\uff0c\u4f7f\u7528\u7684\u683c\u5f0f\u5982\u4e0b\uff08\u6761\u4ef6\uff09\uff1fA\uff1aB\uff0c\u5982\u679c\u6761\u4ef6\u6210\u7acb\uff0c\u8868\u8fbe\u5f0f\u7684\u503c\u5c31\u662fA\uff0c\u5426\u5219\u662fB\u3002
\uff01\u7684\u610f\u601d\u662f\u7528\u6765\u53d6\u975e\u8fd0\u7b97\u7684\uff0c\uff01true\u7684\u7ed3\u679c\u5c31\u662f false \uff01false \u7684\u7ed3\u679c\u662f true\u3002
\u5199\u7a0b\u5e8f\u4e2d\uff0c\uff1f\uff1a\u7528\u7684\u6bd4\u8f83\u5c11\uff0c\uff01\u4e3b\u8981\u7528\u5728\u6761\u4ef6\u5224\u65ad\u4e2d\u3002
\u5ef6\u5c55\u56de\u7b54\uff1a
1\u3001C\u8bed\u8a00\u662f\u4e00\u95e8\u901a\u7528\u8ba1\u7b97\u673a\u7f16\u7a0b\u8bed\u8a00\uff0c\u5e94\u7528\u5e7f\u6cdb\u3002C\u8bed\u8a00\u7684\u8bbe\u8ba1\u76ee\u6807\u662f\u63d0\u4f9b\u4e00\u79cd\u80fd\u4ee5\u7b80\u6613\u7684\u65b9\u5f0f\u7f16\u8bd1\u3001\u5904\u7406\u4f4e\u7ea7\u5b58\u50a8\u5668\u3001\u4ea7\u751f\u5c11\u91cf\u7684\u673a\u5668\u7801\u4ee5\u53ca\u4e0d\u9700\u8981\u4efb\u4f55\u8fd0\u884c\u73af\u5883\u652f\u6301\u4fbf\u80fd\u8fd0\u884c\u7684\u7f16\u7a0b\u8bed\u8a00\u3002
2\u3001\u5c3d\u7ba1C\u8bed\u8a00\u63d0\u4f9b\u4e86\u8bb8\u591a\u4f4e\u7ea7\u5904\u7406\u7684\u529f\u80fd\uff0c\u4f46\u4ecd\u7136\u4fdd\u6301\u7740\u826f\u597d\u8de8\u5e73\u53f0\u7684\u7279\u6027\uff0c\u4ee5\u4e00\u4e2a\u6807\u51c6\u89c4\u683c\u5199\u51fa\u7684C\u8bed\u8a00\u7a0b\u5e8f\u53ef\u5728\u8bb8\u591a\u7535\u8111\u5e73\u53f0\u4e0a\u8fdb\u884c\u7f16\u8bd1\uff0c\u751a\u81f3\u5305\u542b\u4e00\u4e9b\u5d4c\u5165\u5f0f\u5904\u7406\u5668\uff08\u5355\u7247\u673a\u6216\u79f0MCU\uff09\u4ee5\u53ca\u8d85\u7ea7\u7535\u8111\u7b49\u4f5c\u4e1a\u5e73\u53f0\u3002
3\u3001C\u8bed\u8a00\u4e00\u5171\u53ea\u670932\u4e2a\u5173\u952e\u5b57\uff0c9\u79cd\u63a7\u5236\u8bed\u53e5\uff0c\u7a0b\u5e8f\u4e66\u5199\u5f62\u5f0f\u81ea\u7531\uff0c\u533a\u5206\u5927\u5c0f\u5199\u3002\u628a\u9ad8\u7ea7\u8bed\u8a00\u7684\u57fa\u672c\u7ed3\u6784\u548c\u8bed\u53e5\u4e0e\u4f4e\u7ea7\u8bed\u8a00\u7684\u5b9e\u7528\u6027\u7ed3\u5408\u8d77\u6765\u3002C \u8bed\u8a00\u53ef\u4ee5\u50cf\u6c47\u7f16\u8bed\u8a00\u4e00\u6837\u5bf9\u4f4d\u3001\u5b57\u8282\u548c\u5730\u5740\u8fdb\u884c\u64cd\u4f5c\uff0c\u800c\u8fd9\u4e09\u8005\u662f\u8ba1\u7b97\u673a\u6700\u57fa\u672c\u7684\u5de5\u4f5c\u5355\u5143\u3002
fortran\u8bed\u8a00\u4e2d\u53ef\u901a\u8fc7\u5b9a\u4e49\u5b50\u7a0b\u5e8f\u4ece\u800c\u8fd4\u56de\u4e00\u7cfb\u5217\u53d8\u91cf\u503c\uff0c\u800cc\u8bed\u8a00\u7684\u51fd\u6570\u4e00\u822c\u53ea\u80fd\u8fd4\u56de\u4e00\u4e2a\u53d8\u91cf\u503c\u3002
Fortran\u8bed\u8a00\u7684\u6700\u5927\u7279\u6027\u662f\u63a5\u8fd1\u6570\u5b66\u516c\u5f0f\u7684\u81ea\u7136\u63cf\u8ff0\uff0c\u5728\u8ba1\u7b97\u673a\u91cc\u5177\u6709\u5f88\u9ad8\u7684\u6267\u884c\u6548\u7387\u3002\u6613\u5b66\uff0c\u8bed\u6cd5\u4e25\u8c28\u3002\u53ef\u4ee5\u76f4\u63a5\u5bf9\u77e9\u9635\u548c\u590d\u6570\u8fdb\u884c\u8fd0\u7b97\uff0c\u8fd9\u4e00\u70b9\u7c7b\u4f3cMATLAB\u3002\u81ea\u8bde\u751f\u4ee5\u6765\u5e7f\u6cdb\u5730\u5e94\u7528\u4e8e\u6570\u503c\u8ba1\u7b97\u9886\u57df\uff0c\u79ef\u7d2f\u4e86\u5927\u91cf\u9ad8\u6548\u800c\u53ef\u9760\u7684\u6e90\u7a0b\u5e8f\u3002\u5f88\u591a\u4e13\u7528\u7684\u5927\u578b\u6570\u503c\u8fd0\u7b97\u8ba1\u7b97\u673a\u9488\u5bf9Fortran\u505a\u4e86\u4f18\u5316\u3002\u5e7f\u6cdb\u5730\u5e94\u7528\u4e8e\u5e76\u884c\u8ba1\u7b97\u548c\u9ad8\u6027\u80fd\u8ba1\u7b97\u9886\u57df\u3002
C\u8bed\u8a00\u662f\u4e00\u4e2a\u6709\u7ed3\u6784\u5316\u7a0b\u5e8f\u8bbe\u8ba1\u3001\u5177\u6709\u53d8\u91cf\u4f5c\u7528\u57df\uff08variable scope\uff09\u4ee5\u53ca\u9012\u5f52\u529f\u80fd\u7684\u8fc7\u7a0b\u5f0f\u8bed\u8a00\u3002C\u8bed\u8a00\u4f20\u9012\u53c2\u6570\u5747\u662f\u4ee5\u503c\u4f20\u9012\uff08pass by value\uff09\uff0c\u53e6\u5916\u4e5f\u53ef\u4ee5\u4f20\u9012\u6307\u9488\uff08a pointer passed by value\uff09\u3002\u4e0d\u540c\u7684\u53d8\u91cf\u7c7b\u578b\u53ef\u4ee5\u7528\u7ed3\u6784\u4f53\uff08struct\uff09\u7ec4\u5408\u5728\u4e00\u8d77\u3002\u53ea\u670932\u4e2a\u4fdd\u7559\u5b57\uff08reserved keywords\uff09\uff0c\u4f7f\u53d8\u91cf\u3001\u51fd\u6570\u547d\u540d\u6709\u66f4\u591a\u5f39\u6027\u3002\u90e8\u4efd\u7684\u53d8\u91cf\u7c7b\u578b\u53ef\u4ee5\u8f6c\u6362\uff0c\u4f8b\u5982\u6574\u578b\u548c\u5b57\u7b26\u578b\u53d8\u91cf\u3002\u901a\u8fc7\u6307\u9488\uff08pointer\uff09\uff0cC\u8bed\u8a00\u53ef\u4ee5\u5bb9\u6613\u7684\u5bf9\u5b58\u50a8\u5668\u8fdb\u884c\u4f4e\u7ea7\u63a7\u5236\u3002\u9884\u7f16\u8bd1\u5904\u7406\uff08preprocessor\uff09\u8ba9C\u8bed\u8a00\u7684\u7f16\u8bd1\u66f4\u5177\u6709\u5f39\u6027\u3002
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
static int v[1024];//访问数组
static char t[1024][1024], a[1024];
static int j = 0, count = 0;
void pailie(char *s, int M, int k)
{
int i;
if (j != M)
{
for (i = 0; i < strlen(s); i++)
{
if (v[i] == 0)
{
v[i] = 1;
a[j] = s[i];
j++;
pailie(s, M, i);
}
}
}
else
{
a[j] = '\0';
for (i = 0; i < count; i++)
{
if (strcmp(t[i], a) == 0)i = count + 1;
}
if (i == count)
{
strcpy(t[count], a);
count++;
}
}
j--;
v[k] = 0;
}
int main()
{
char s[1024];
int M;
printf("请输入字符串：");
gets(s);
printf("
请输入所取字符个数M：");
scanf("%d", &M);
for (int i = 0; i < strlen(s); i++)
v[i] = 0;
pailie(s, M, 0);
printf("
得到的排列总数为：%d
", count);
printf("
得到的所有排列为：
");
for (int i = 0; i < count; i++)
printf("%s", t[i]);
printf("
");
system("pause");
}
绛旓細include <stdio.h> include <ctype.h> int main (void){ char ch[100];int a = 0;gets (ch);while (ch[a] != '\0'){ if (isupper (ch[a]))ch[a] = tolower (ch[a]);else if (islower (ch[a]))ch[a] = toupper (ch[a]);else ch[a] += 1;a++;} puts (ch);...
绛旓細gets(my_string) ; /* 浠庨敭鐩樹笂杈撳叆浠绘剰涓涓瀛楃涓诧紝闀垮害涓嶈瓒呰繃 MAX_STRLEN */ for( i = 0 ; my_string[i] != '\0' ; i ++ ) /* 鍒ゆ柇褰撳墠瀛楃鏄惁涓哄瓧绗︿覆缁撴潫绗︼細'\0' */ if( ( my_string[i] >= 'a' ) && ( my_string[i] <= 'z' ) ) /* 鑻ュ綋鍓嶅瓧绗︿负灏忓啓...
绛旓細include <stdio.h>#include <stdlib.h>int main (void) {char c1, c2;c1 = getchar ();c2 = c1-32;putchar (c2);system ("pause");return 0;}
绛旓細include <stdio.h>int main() {int i = 0;char s[100];fgets(s,100,stdin);while(s[i]) {if(s[i] >= 'a' && s[i] <= 'z')s[i] -= 'a' - 'A';++i;}printf("%s\n",s);return 0;}
绛旓細include<stdio.h>int main(){ char c;scanf("%c",&c); if(c>='a' && c<='z')c+='A'-'a' printf("%c\n",c) return 0;} int main() { char c; printf("杈撳叆涓涓瀛楁瘝锛"); scanf("%c", &c); if('a'<=c && c<='z') { c += 32; pri...
绛旓細include "stdio.h"main(){ char c;int i,j,k,t;printf("\nEnter char:");scanf("%c",&c);t=c-96;printf("\n");if(t>=2){ for(i=0;i<t;i++){ for(j=t-i;j>0;j--)printf(" ");for( k=0;k
绛旓細鍏朵粬绫讳技闂2014-11-24 杈撳叆涓涓瀛楁瘝,鑻ユ槸灏忓啓瀛楁瘝,鍒欏彉涓哄ぇ鍐欒緭鍑,鍚﹀垯,鍘熸牱杈撳嚭,... 39 2013-10-12 c璇█,浠庨敭鐩樹腑杈撳叆涓涓瓧绗,濡傛灉鏄ぇ鍐欏瓧姣,杞崲鎴愬皬鍐欏瓧姣... 48 2014-03-22 c璇█,缂栫▼瀹炵幇,鎶婅緭鍏ョ殑涓琛屽瓧绗﹀師鏍疯緭鍑,鑻ユ槸澶у啓瀛楁瘝鍒欒浆... 7 2009-12-27 缂栦竴C璇█绋嬪簭,浠绘剰杈撳叆涓涓...
绛旓細include<stdio.h>int main(void){ char c='N',s[300],*p; gets(s); for(p=s; *p; p++) { while(*p>='a'&&*p<='z') { putchar(*p++); c='Y'; }; if(c=='Y') { putchar('\n'); c='N'; } } return 0;} ...
绛旓細瀹炵幇璇ュ姛鑳界殑鍚璇█鍏蜂綋浠ｇ爜濡備笅锛歩nclude <stdio.h> include <stdlib.h> include <string.h> int main(){ FILE *fp;int i=0;char str[100];printf("璇杈撳叆瀛楃涓诧紝骞朵笖浠ユ劅鍙瑰彿!缁撴潫:\n");if((fp=fopen("test.txt","w"))==NULL)//鎵撳紑杈撳嚭鏂囦欢骞朵娇fp鎸囧悜姝ゆ枃浠 { printf("鏃犳硶鎵撳紑...
绛旓細include int main(){ char ch;scanf("%c",&ch);//濡傛灉鏄灏忓啓瀛楁瘝 if(ch >= 'a' && ch <= 'z'){ printf("%c\n",ch-('a'-'a'));} return 0;}鍚屼竴瀛楁瘝鐨勫皬鍐欐瘮澶у啓澶х殑鍊间负('a'-'a')锛屾墍浠ュ噺鎺夎繖涓樊鍊煎氨琛屼簡銆
