#include <stdio.h>
struct Ellipse{
int chokkei;
int tannkei;
double ennsyuuritu;
double menseki;
} date;
int main(void) {
date.chokkei = 4;
date.tannkei = 2;
date.ennsyuuritu = 3.14;
printf("直径の長さは%d、短径の長さは%dです。\n", date.
chokkei, date.
tannkei);
date.menseki = date.chokkei*date.tannkei*date.ennsyuuritu;
printf("面積は%lfです。\n", date.
menseki);
return 0;
}
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