열혈강의 C 연습문제 ex 12-1

문제 2번 

#include <stdio.h>

int main(void)

{

char a='a';

int b=1;

float c=1.3f;

double d=3.5;

char* p1=&a;

int *p2=&b;

float* p3=&c;

double* p4=&d;

*p1+=1;

*p2+=1;

*p3+=1;

*p4+=1;

printf("%c\n",a);

printf("%d\n",b);

printf("%f\n",c);

printf("%f\n",d);

return 0;

}

문제 3번 

#include <stdio.h>

int main(void)

{

int a=10,b=20;

int *p1=&a;

int *p2=&b;

int *p3;

*p1-=1;

*p2-=1;

p3=p1;

p1=p2;

p2=p3;

printf("%d\n",*p1);

printf("%d\n",*p2);

return 0;

}