이것이 c언어다. 15장 프로필교환

프로필 교환하기. 교환할때 int형과 double형을 하나의 함수로 스왑해주기.

#include <stdio.h>

#include <string.h>

void swap(char *pc, void* a, void* b);

void printProfile(int a, double t);

int main(int argc, char *argv[])

{

    int firstAge;

    int secondAge;

    double firstTall;

    double secondTall;

    printf("enter the age and tall of first person. : ");

    scanf("%d %lf",&firstAge,&firstTall);

    printf("enter the age and tall of second person. : ");

    scanf("%d %lf",&secondAge,&secondTall);

    printProfile(firstAge,firstTall);

    printProfile(secondAge,secondTall);

    swap("int",(void*)&firstAge,(void*)&secondAge);

    swap("double",(void*)&firstTall,(void*)&secondTall);

    printProfile(firstAge,firstTall);

    printProfile(secondAge,secondTall);

    return 0;

}

void swap(char *pc, void* a, void* b)

{

    if( strcmp(pc,"int") == 0)

    {

        int t;

        t = *(int*)a;

        *(int*)a = *(int*)b;

        *(int*)b = t;

    }

    if( strcmp(pc,"double") == 0)

    {

        double t;

        t = *(double*)a;

        *(double*)a = *(double*)b;

        *(double*)b = t;

    }

}

void printProfile(int a, double t)

{

    printf("age : %d, tall : %.2lf \n",a,t);

}