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请将代码补充完整。01 #include 0203 int factorial(int);0405 int main()06 {07 int n;08 scanf("%d", &n);09 printf("%d!=%d", n, factorial(n));10 return 0;11 }1213 int factorial(int n)14 {15 if (n == 0 || n == 1)16 return 1;17 return;18 }

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请将代码补充完整。01 #include 0203 int str2int(char str); //字符串转化为int数值04 char getString(char str); //输入字符串05 int isNum(int);0607 int main()08 {09 char str[21];10 int i;11 getString(str);12 i = str2int(str);13 printf("%d\n", i);14 printf("%d", ii);15 return 0;16 }1718 int str2int(char str)19 {20 int rs = 0;21 while (str)22 {23 if (isNum(str))24 rs = rs 10 + str - '0';25 ++str;26 }27 return rs;28 }2930 int isNum(int n)31 {32 return n >= '0'&&;33 }3435 char getString(char str)36 {37 //assert(str); //可自行扩充，对str进行一些合法性检查，或退出程序，或弹窗，或输出错误信息38 char buffer = str;39 while (1)40 {41 char temp = getchar();42 if (temp == '\n')43 ;44 buffer = temp;45 ++buffer;46 }47 buffer = 0;48 ;49 }

请将代码补充完整。01 #include 0203 void _strcpy(char target, char src); //拷贝字符串的函数04 char getString(char str); //输入字符串0506 int main()07 {08 char a[256], b[256];09 getString(a);10 _strcpy(b,a);11 printf("%s\n",b);12 return 0;13 }1415 void _strcpy(char target, char src)16 {17 int i = 0;18 char c = 0;19 while((c=(src+i)) != 0)20 {21 (target + i) = c;22 ++i;23 }24 (target+i)=0;25 }2627 char getString(char str)28 {29 //assert(str); //可自行扩充，对str进行一些合法性检查，或退出程序，或弹窗，或输出错误信息30 char buffer = str;31 while (1)32 {33 char temp = getchar();34 if (temp == '\n')35 {36 ;37 }38 buffer = temp;39 ++buffer;40 }41 buffer = 0;42 ;43 }

请将代码补充完整。01 #include 02 #include 03 #include 0405 char getFileExtName(char );0607 int main()08 {09 char fname[255], extname;10 scanf("%s", fname);11 extname = getFileExtName(fname);12 printf(extname);13 free(extname);14 return 0;15 }1617 char getFileExtName(char filename)18 {19 int len = strlen(filename);20 int i = len - 1, size = 0, j = 0;21 char p = NULL;22 while(i >= 0)23 {24 if((filename+i) == '.');25 --i;26 }27 if(i < 0) return NULL;28 size = len-i;29 p = (char )malloc(sizesizeof());30 for(j = 0; j < size; j++)31 {32 (p+j)=filename[i+j+1];33 }34 *(p+j)=0;35 ;36 }

请将代码补充完整。01 #include 0203 int _strcmp(char , char );0405 int main()06 {07 char str[2][255];08 for(int i=0;i<2;++i)09 {10 scanf("%s",);11 }12 switch(_strcmp(str[0],str[1]))13 {14 case -1: printf("str1 < str2\n"); break;15 case 0: printf("str1 = str2\n"); break;16 case: printf("str1 > str2\n");17 }18 return 0;19 }2021 int _strcmp(char str1, char str2)22 {23 int rs = 0, i = 0;24 while(((str1+i) == (str2+i)) && (str1+i)!=0 && (str2+i)!=0)25 {26 ;27 }28 if((str1+i) > (str2+i)) rs = 1;29 else if((str1+i) < (str2+i)) rs = -1;30 ;31 }