입력값 : i am a stUdEnt
결과값 : I Am A Student
Press any key to continue

 

#include <stdio.h>

#include <ctype.h>

 

int main()

{

                  char chData[100]="i am a stUdEnt";

                  int i=0;

                  char chNowData;

                  int iFirstChar;// 첫번째 문자인지 검사(즉, 대문자로 바꿀것인지 체크)

 

                  iFirstChar = 1;// 일단 처음에는 대문자로

                  while ('\0' != (chNowData = chData[i])) // 마지막 문자열인지 검사

                  {

                                   if (' '==chNowData)

                                   {

                                                     iFirstChar = 1;

                                   }else{

                                                     if (iFirstChar)

                                                     {

                                                                       int aa= islower(chNowData);

                                                                       if(2 == islower(chNowData)){ // 소문자이면

 

                                                                                         chData[i] = chNowData -('a'-'A');

                                                                       }

                                                                       iFirstChar = 0;

                                                     }else{

                                                                       int aa= islower(chNowData);

                                                                       if(0 == islower(chNowData)){ // 대문자이면

 

                                                                                         chData[i] = chNowData +('a'-'A');

                                                                       }

                                                     }

                                   }

 

//                                 printf("%c",chNowData);

                                   i++;

                  }

 

                  printf("\r\n%s",chData);

                  return 0;

}