1.
#include<stdio.h>
void ThreeNumPlus(int a,int b,int c){
printf("%d + %d + %d = %d\n",a,b,c,a+b+c);
}
int main(){
ThreeNumPlus(10,20,30);
return 0;
}
2.
#include<stdio.h>
double SquareSpace(double a,double b){
return a * b ;
}
int main(){
double ans;
ans = SquareSpace(20,20);
printf("四角形の面積は %f\n",ans);
return 0;
}
3.
#include<stdio.h>
double function(double x){
return x*x*x-3*x*x;
}
int main(){
double ans = function(4.0);
printf("ans = %f",ans);
return 0;
}