f(æ¡ä»¶)
ãã{åæ¯1}
ããelse
ãã{åæ¯2}
ããè¿æ¯å
¸åçåæ¯ç»æï¼å¦ææ¡ä»¶æç«ï¼æ§è¡åæ¯1ï¼å¦åæ§è¡åæ¯2ï¼åæ¯1ååæ¯2é½å¯ä»¥æ¯1æ¡æè¥å¹²æ¡è¯å¥ææãå¦ï¼æ±ax^2+bx+c=0çæ ¹
ããåæï¼å 为å½b^2-4ac>=0æ¶,æ¹ç¨æ两个
å®æ ¹ï¼å¦åï¼b^2-4ac<0ï¼æ两个
å
±è½å¤æ ¹ãå
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ããd=b*b-4*a*c;
ããif(d>=0)
ãã{x1=(-b+sqrt(d))/2a;
ããx1=(-b-sqrt(d))/2a;
ããprintf(âx1=%8.4f,x2=%8.4f\nâ,x1,x2);
ãã}
ããelse
ãã{r=-b/(2*a);
ããi =sqrt(-d)/(2*a);
ããprintf(âx1=%8.4f+%8.4fi\nâr, i);
ããprintf(âx2=%8.4f-%8.4fi\nâr,i)
ãã}