>>839
時間ないから超適当ｗ
$ a.out .2 .4 .1　みたいな感じで。

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define RANGE 20
int main(int argc,char *argv[]){
int graph[RANGE*2][RANGE*2],i,j,temp;
float x,y,a,b,c;
memset(graph,0,sizeof(graph));
a = atof(argv[1]);
b = atof(argv[2]);
c = atof(argv[3]);
for(i=0,x=(float)(-1)*RANGE/10;x<(float)RANGE/10;x+=.1,i++){
y = a*x*x + b*x + c;
temp =(int) RANGE + y * 10;
graph[temp][i]=1;
}
for(i=RANGE*2-1;i>=0;i--){
for(j=0;j<RANGE*2;j++){
if(graph[i][j]==1) printf("*");
else if (i==RANGE) printf("-");
else if (j==RANGE) printf("l");
else printf(" ");
}
printf("\n");
}
return 0;
}