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- #include <stdio.h>
- #include <string.h>
- int main()
- {
- char str[100];
- gets(str);
- for(int i=0; i<strlen(str); i++)
- {
- if(str[i]>64 && str[i]<91)
- printf("%c", str[i]+=32);
- else
- {
- if(str[i]>96 && str[i]<123)
- printf("%c", str[i]-=32);
- else
- printf(" ");
- }
- }
- }
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