pvjc20/du1/program.c

#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>

int main()
{   
    char simb;
    int riad=0;
    while(1){
    	simb=getchar();
    	if(islower(simb)){
       		simb-=32;
   	}
    	else if (isupper(simb)){
        	simb+=32;
   	}
    	else if(simb==EOF){
        	break;    
    	}
        if(simb=='\n'){
                riad++;
        }
    	putchar(simb);
    }
    printf("\nPočet riadkov: %d\n",riad);
    return 0;
}