C/ctype.h/tolower

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Материал из C\C++ эксперт

    

//Declaration:  int tolower(int ch); 
//Function:     returns the lowercase equivalent of ch if ch is a letter or ch is returned unchanged. 

  
#include <ctype.h>
#include <stdio.h>
int main(void){
  putchar(tolower("Q"));
}
         
/*
q*/