C Programming :: Basic Concepts

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#include<stdio.h>
void main()
{
char c=' ',x,convert(z);
getc(c);
if((c>='a') && (c<='z'))
x=convert(c);
printf("%c",x);
}
convert(z)
{
return z-32;
}

#include<stdio.h>
int swap(int *a,int *b)
{
*a=*a+*b;*b=*a-*b;*a=*a-*b;
}
void main() 
{
int x=10,y=20;
swap(&x,&y);
printf("x= %d y = %d\n",x,y);
}

#include<stdio.h>
void main()
{ 
printf("sizeof (void *) = %d \n", sizeof( void *)); 
printf("sizeof (int *)   = %d \n", sizeof(int *)); 
printf("sizeof (double *) = %d \n", sizeof(double *));
printf("sizeof(struct unknown *) = %d \n", sizeof(struct unknown *));
}

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Why C Programming Basic Concepts?

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