C Primer Plus（第6版）第二章答案

1.

#include <stdio.h>

int main (void) {
    printf ("Gustav Mahler\n");
    printf ("Gustav\nMahler\n");
    printf ("Gustav ");
    printf ("Mahler");

    return 0;
}

2.

#include <stdio.h>

int main (void) {
    printf("Name:name\nAddress:address");
    
    return 0;
}

3.

#include <stdio.h>

int main (void) {
    int age = 20;
    
    printf ("age:%d\ndays:%d", age, age * 365);

    return 0;
}

4.

#include <stdio.h>

void jolly (void);
void deny (void);

int main (void) {
    int i;
    
    for(i = 0; i < 3; i++)
        jolly ();
    deny ();

    return 0;
}


void jolly (void) {
    printf ("For he's a jolly good fellow!\n");
}


void deny (void) {
    printf ("Which nobody can deny!\n");
}

5.

#include <stdio.h>

void br (void);
void ic (void);

int main (void) {
    br ();
    printf (", ");
    ic ();
    printf ("\n");
    ic ();
    printf (",\n");
    br ();
    
    return 0;
}


void br (void) {
    printf("Brazil, Russia");
}


void ic (void) {
    printf("India, China");
}

6.

#include <stdio.h>

int main (void) {
    int toes = 10;

    printf("%d\n%d\n%d", toes, toes * 2, toes* toes);

    return 0;
}

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7.

#include <stdio.h>

void Print (void);

int main (void) {
    int i, j;

    for (i = 3; i > 0; i--) {
        for(j = 0; j < i; j++) {
            Print ();
        }
        printf("\n");
    }

    return 0;
}


void Print (void) {
    printf("Smile!");
}

8.

#include <stdio.h>

void one_three (void);
void two (void);

int main (void) {
    printf ("starting now:\n");
    one_three ();
    printf ("done!");

    return 0;
}


void one_three (void) {
    printf ("one\n");
    two ();
    printf ("three\n");
}


void two (void) {
    printf ("two\n");
}