t include include main() { float a,b,x; printf(Nhap a ); scanf(%f, a); printf(Nhap b ); scanf(%f, b); if(a=0) { x= ba; printf(Nghiem x= %f, x); } else if(b=0) printf(phuong trinh vo nghiem); else printf(phuong trinh vo so nghiem); getch(); } 2 include include include main() { float a,b,c,delta,x,x1,x2; printf(Nhap a = ); scanf(%f, a); printf(Nhap b = ); scanf(%f, b); printf(Nhap c = ); scanf(%f, c); if(a=0).
t #include #include main() { float a,b,x; printf("Nhap a : "); scanf("%f", &a); printf("Nhap b : "); scanf("%f", &b); if(a!=0) { x=-b/a; printf("Nghiem x!= %f", x); } else if(b!=0) printf("phuong trinh vo nghiem"); else printf("phuong trinh vo so nghiem"); getch(); } #include #include #include main() { float a,b,c,delta,x,x1,x2; printf("Nhap a = "); scanf("%f", &a); printf("Nhap b = "); scanf("%f", &b); printf("Nhap c = "); scanf("%f", &c); if(a!=0) { delta=b*b-4*a*c; if(delta>0) { x1 = (-b+sqrt(delta))/(2*a); x2 = (-b-sqrt(delta)) / (2*a); printf("Phuong trinh co nghiem phan biet la \n"); printf("x1 = %f \n",x1); printf("x2 = %f",x2); } else if (delta==0) { x=-b/(2*a); printf("Phuong trinh co nghiem kep = %f",x); } else printf("Phuong trinh vo nghiem"); } else printf("Khong phai phuong trinh bac 2"); getch(); } #include #define tich(x,y) x*y // phan biet voi code duoi int main() { int a=2, b=2019; printf("%d * %d = %d",a, b, tich(a,b)); return 0; } i 5: #include #define tich(x,y) (x)*(y) // de phan biet voi code tren int main() { int a=2, b=2019; printf("%d * %d = %d",a, b, tich(a,b)); return 0; } #include #include int main() { int a,y; a=1; a=a++; printf("\n a=a++ %d",a); y=a+1*2+16/a+3; printf("\n y=a+1*2+16/1+3= %d",y); y*=4+5; printf("\n y*=4+5 la %d",y); printf("\n a= %d",a); printf("\n y= %d",y); } Bai #include #include int main() { int s=9,i=5,j=7; int lan=1; while (2*i b ? a : b; // Neu a>b max la a, nguoc lai max la b } // Max cho so int max3(int a, int b, int c) { return max2( max2(a, b), c); } // Mxx cho so int max4(int a, int b, int c, int d) { return max2( max2(a, b), max2(c, d) ); } // Ham chinh int main() { int a = 126, b = 188, c = 86, d = 2019; printf("Gia tri a= %d\n",a); printf("Gia tri b= %d\n",b); printf("Gia tri c= %d\n",b); printf("Gia tri d= %d\n",d); printf("So lon nhat a, b la %d\n", max2(a, b)); printf("So lon nhat a, b, c la %d\n", max3(a, b, c)); printf("So lon nhat a, b, c, d la %d\n", max4(a, b, c, d)); return 0; } #include #include float max(float x[],int n) { int i; float max=x[0]; for (i=1;imax) max=x[i]; return max; } int main() { float x[3]={15.11,129,8999}; float p; p=max(x,3); printf("\n Gia tri lon nhat = %f",p); return 0; getch(); } B I #include #include #include int main() { char s[30]; int i,n; printf(" Nhap chuoi \n"); gets(s); n=strlen(s); for (i=0;i