C言語のプログラムは現代の方法の第2版を設計して、第3章の授業の後でプログラミングの練習問題のすべての解答
3431 ワード
シロが1匹、間違いがあるかもしれません
3.1
3.2
3.3
3.4
3.5 これは配列を使わないのが面倒なようで、まだ少し知っていて、ガチョウはどこがうるさいと感じて、長すぎます
3.6 蛇を描いて最后の分式の约分に足を添えたいですね.
3.1
#include
int main (void)
{
int day, month, year;
printf ("Enter a date (mm/dd/yyyy):");
scanf ("%d/%d/%d", &month, &day, &year);
printf ("You entered the date %d%.2d%.2d", year, month, day);
// %.2d 2
return 0;
}
3.2
#include
int main (void)
{
int number;
float price;
int day, month, year;
printf ("Enter item number:");
scanf ("%d", &number);
printf ("Enter unit price:");
scanf ("%f", &price);
printf ("Enter purchase date (mm/dd/yyyy):");
scanf ("%d/%d/%d", &month, &day, &year);
printf ("Item\t\tUnit\t\tPurchase
");
printf ("\t\tPrice\t\tDate
");
printf ("%d\t\t$%7.2f\t%.2d/%.2d/%d", number, price, month, day, year);
return 0;
}
3.3
#include
int main (void)
{
int gp, gi, pc, in, cd;
printf ("Enter ISBN:");
scanf ("%d-%d-%d-%d-%d", &gp, &gi, &pc, &in, &cd);
printf ("Gs1 prefix: %d
", gp);
printf ("Group identifier: %d
", gi);
printf ("Publisher code: %d
", pc);
printf ("Item number: %d
", in);
printf ("Check digit: %d
", cd);
return 0;
}
3.4
#include
int main (void)
{
int a, b, c;
printf ("Enter phone number [(xxx)xxx-xxxx]: ");
scanf ("(%d)%d-%d", &a, &b, &c);
printf ("You entered %d.%d.%d", a, b, c);
return 0;
}
3.5 これは配列を使わないのが面倒なようで、まだ少し知っていて、ガチョウはどこがうるさいと感じて、長すぎます
#include
int main (void)
{
int a[4][4];
int i, j;
printf ("Enter the numbers from 1 to 16 in any order:
");
for (i=0; i<4; i++){
for (j=0; j<4; j++){
scanf ("%d", &a[i][j]);
}
}
for (i=0; i<4; i++){
for (j=0; j<4; j++){
printf ("%2d\t", a[i][j]);
}
printf ("
");
}
int row[4], col[4], dia[4];
int sum = 0;
// ;
printf ("Row sums: ");
for (i=0; i<4; i++){
sum = 0;
for (j=0; j<4; j++){
sum += a[i][j];
}
row[i] = sum;
}
for (i=0; i<4; i++) {
printf ("%d ", row[i]);
}
printf ("
");
// ;
printf ("Column sums: ");
for (j=0; j<4; j++){
sum = 0;
for (i=0; i<4; i++){
sum += a[i][j];
}
col[j] = sum;
}
for (i=0; i<4; i++) {
printf ("%d ", col[i]);
}
printf ("
");
// ;
printf ("Diagonal sums: ");
sum = 0;
for (i=0; i<4; i++){
sum += a[i][i];
}
dia[0] = sum;
sum = 0;
for (i=0; i<4; i++){
sum += a[i][3-i];
}
dia[1] = sum;
for (i=0; i<2; i++) printf ("%d ", dia[i]);
return 0;
}
3.6 蛇を描いて最后の分式の约分に足を添えたいですね.
#include
int main (void)
{
int num1, denom1, num2, denom2, result_num, result_denom;
printf ("Enter two fractions separated by a plus sign: ");
scanf ("%d/%d+%d/%d", &num1, &denom1, &num2, &denom2);
result_num = num1 *denom2 + num2 * denom1;
result_denom = denom1 * denom2;
printf ("The sum is %d/%d", result_num, result_denom);
return 0;
}