型と演算について確認する
明解C言語 入門編 > 2. 演算と型 >
型と演算について確認する
C
#include <stdio.h>
int main(int argc, char* argv[])
{
int n1, n2, n3, n4;
double d1, d2, d3, d4;n1 = 5 / 2;
n2 = 5.0 / 2.0;
n3 = 5.0 / 2;
n4 = 5 / 2.0;d1 = 5 / 2;
d2 = 5.0 / 2.0;
d3 = 5.0 / 2;
d4 = 5 / 2.0;printf("n1 = %d\n", n1);
printf("n2 = %d\n", n2);
printf("n3 = %d\n", n3);
printf("n4 = %d\n\n", n4);printf("d1 = %f\n", d1);
printf("d2 = %f\n", d2);
printf("d3 = %f\n", d3);
printf("d4 = %f\n", d4);return 0;
}
実行結果
R:\>lesson012\project1.exe
n1 = 2
n2 = 2
n3 = 2
n4 = 2d1 = 2.000000
d2 = 2.500000
d3 = 2.500000
d4 = 2.500000
C++
#include <iostream.h>int main(int argc, char* argv[])
{
int n1, n2, n3, n4;
double d1, d2, d3, d4;n1 = 5 / 2;
n2 = 5.0 / 2.0;
n3 = 5.0 / 2;
n4 = 5 / 2.0;d1 = 5 / 2;
d2 = 5.0 / 2.0;
d3 = 5.0 / 2;
d4 = 5 / 2.0;cout << "n1 = " << n1 << endl;
cout << "n2 = " << n2 << endl;
cout << "n3 = " << n3 << endl;
cout << "n4 = " << n4 << endl;cout << endl;
cout << "d1 = " << d1 << endl;
cout << "d2 = " << d2 << endl;
cout << "d3 = " << d3 << endl;
cout << "d4 = " << d4 << endl;cout << endl;
cout << "d1 = " << showpoint << d1 << endl;
cout << "d2 = " << d2 << endl;
cout << "d3 = " << d3 << endl;
cout << "d4 = " << d4 << endl;return 0;
}
実行結果
T:\>lesson012\Project1.exe
n1 = 2
n2 = 2
n3 = 2
n4 = 2d1 = 2
d2 = 2.5
d3 = 2.5
d4 = 2.5d1 = 2.00000
d2 = 2.50000
d3 = 2.50000
d4 = 2.50000
Delphi
program Project1;{$APPTYPE CONSOLE}
uses
SysUtils;
var
n1, n2, n3, n4: Integer;
d1, d2, d3, d4: Double;
begin
n1 := 5 div 2 ;
// n2 := 5.0 div 2.0;
// n3 := 5.0 div 2;
// n4 := 5 div 2.0;d1 := 5 / 2 ;
d2 := 5.0 / 2.0;
d3 := 5.0 / 2;
d4 := 5 / 2.0;write(format('n1 = %d'#13#10, [n1]));
// Write(format('n2 = %d'#13#10, [n2]));
// Write(format('n3 = %d'#13#10, [n3]));
// Write(format('n4 = %d'#13#10#13#10, [n4]));write(format('d1 = %.6f'#13#10, [d1]));
write(format('d2 = %.6f'#13#10, [d2]));
write(format('d3 = %.6f'#13#10, [d3]));
write(format('d4 = %.6f'#13#10, [d4]));
end.
実行結果
S:\>lesson012\project1.exe
n1 = 2
d1 = 2.500000
d2 = 2.500000
d3 = 2.500000
d4 = 2.500000