DouKaku?

#include <stdio.h>

int main()
{
    printf("Hello, world!");
    return 0;
}

#include<stdio.h>
int func1(int x)
{
    return 87.5+x*(49.6-x*(23.4+x*(10.92-x*(8.9926+x*(0.9083-x*(1.15363
            +x*(0.058376-x*(0.0680293+x*(0.0036643-x*(0.001878514
            +x*(1.313232e-4-x*(1.94342e-5+x*1.685236e-6))))))))))));
}
int main(){
    int n;
    for(n=-7;n<7;n++){
        putchar(func1(n));
    }
    return 0;
}

#include<stdio.h>
int main(void){
  int c[]={
    0x7f,0x08,0x08,0x08,0x7f,0x00,
    0x38,0x54,0x54,0x54,0x58,0x00,
    0x00,0x41,0x7f,0x40,0x00,0x00,
    0x00,0x41,0x7f,0x40,0x00,0x00,
    0x38,0x44,0x44,0x44,0x38,0x00,
    0x00,0x50,0x30,0x00,0x00,0x00,
    0x3c,0x40,0x30,0x40,0x3c,0x00,
    0x38,0x44,0x44,0x44,0x38,0x00,
    0x7c,0x08,0x04,0x04,0x08,0x00,
    0x00,0x41,0x7f,0x40,0x00,0x00,
    0x30,0x48,0x48,0x48,0x7f,0x00,
    0x00,0x00,0x5f,0x00,0x00,0x00};
  for(int i=0;i<8;i++){
    for(int j=0;j<72;j++)
      printf("%c",(c[j]>>i&1)*3+32);
    printf("\n");
  }
  return 0;
}

#include <stdio.h>

int main(void)
{
    printf("Hello, world!\n");
    return 0;
}