GIẢI PHƯƠNG TRÌNH BẬC HAI ỨNG DỤNG NGÔN NGỮ C include include void main() { float a, b, c, delta; printf( Giai phuong trinh bac hai AXý + BX + C = 0); printf( Cho biet ba he so A B C : ); scanf(%f%f%f, a, b, c); delta = b b 4 a c; if (delta 20 ) { n = 19 ; in case of n is greater than 20 printf( %d is greater than 20 set to be default as 19 .,n ); } end if
GIẢI PHƯƠNG TRÌNH BẬC HAI ỨNG DỤNG NGÔN NGỮ C #include <stdio.h> #include <math.h> void main() { float a, b, c, delta; printf("\nGiai phuong trinh bac hai AXý + BX + C = 0"); printf("\nCho biet ba he so A B C : "); scanf("%f%f%f", &a, &b, &c); delta = b * b - 4 * a * c; if (delta<0) printf("Phuong trinh vo nghiem"); else if (delta == 0) printf("Phuong trinh co nghiem kep x1 = x2 = %f", -b/ (2*a)); else { printf("Phuong trinh co hai nghiem phan biet\nx1 = %f", (-b + sqrt(delta))/(2*a)); printf("\nx2 = %f", (-b - sqrt(delta))/(2*a)); } getch(); } MA PHƯƠNG #include <stdio.h> #include <conio.h> // func declaration void matrix( int n ); // main() int main(void) { int n; // input until it's valid. do { printf("\n Plz input size of matrix [ odd size & n < 20 ]: n = "); scanf("%d",&n); if ( n % 2 == 0 ) printf("\n Invalid input value Plz re-input \n"); } while ( n % 2 == 0 ); if ( n > 20 ) { n = 19 ; // in case of n is greater than 20 printf("\n %d is greater than 20 & set to be default as 19 .",n ); } // end if // call matrix() matrix(n); // stop to watch getch(); return 0; } // function matrix(int n) void matrix( int n ) { int a[20][20]; int i, j, row, col, count = 1; int old_row, old_col, sum = 0; // set starting value of array for ( i = 0 ; i < n ; i++ ) for ( j = 0 ; j < n ; j++ ) a[i][j] = 0; // set the 1st value to start row = 0; col = (n-1) / 2; while ( count < n*n + 1 ) { a[row][col] = count++ ; // set value for elements old_row = row ; old_col = col; // save the last addresses // define whether going out of array row -= 1; if ( row == -1 ) row = n - 1; col += 1; if ( col == n ) col = 0; // in case of already having number if ( a[row][col] != 0 ) { row = old_row + 1; col = old_col; } // end if } // end while // print result printf("\n"); for ( i = 0 ; i < n ; i++ ) { for ( j = 0 ; j < n ; j++ ) printf("%4d",a[i][j]); printf("\n"); } // end for // calculate sum for ( j = 0 ; j < n ; j++ ) sum += a[0][j]; printf("\n Sum of each row - column - diagonal line is : %d " , sum); return; } . GIẢI PHƯƠNG TRÌNH B C HAI ỨNG DỤNG NGÔN NGỮ C #include <stdio.h> #include <math.h> void main() { float a, b, c, delta; printf(" Giai phuong trinh bac hai AXý + BX + C =. sqrt(delta))/(2*a)); printf(" x2 = %f", (-b - sqrt(delta))/(2*a)); } getch(); } MA PHƯƠNG #include <stdio.h> #include <conio.h> // func declaration void matrix( int n ); // main() int main(void) { . // call matrix() matrix(n); // stop to watch getch(); return 0; } // function matrix(int n) void matrix( int n ) { int a[20][20]; int i, j, row, col, count = 1; int old_row, old_col,