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lab_3.c

+
+int main(){
+
+printf("even/odd\n");
+
+int x;
+
+printf("give a whole number: ");
+scanf("%i", &x);
+
+if (x == 0){printf("number is 0\n");}
+else if (x%2 == 1){printf("number is odd\n");}
+else {printf("number is even\n");};
+
+
+printf("\nequation\n");
+
+float a, b, c;
+printf("give values of a,b,c for: \na * x^2 + b * x + c\n");
+printf("a = ");scanf("%f", &a);
+printf("b = ");scanf("%f", &b);
+printf("c = ");scanf("%f", &c);
+printf("equation formula is:\n%f * x^2 + %f * x + %f", a, b, c);
+
+if (a==0 && b ==0 && c==0){printf("\nequation is indeterminate");}
+else if (a==0 && b==0){printf("\nequation is contradictory");}
+else if (a == 0){printf("\nequation is linear\nsolution of the equation is: %f",-c/b);}
+else {printf("\nequation is quadratic");
+    float d = b*b-4*a*c;printf("%f",d);
+    if (d == 0){printf("\nsolution of the equation is: %f",-b/(2*a));}
+    else if (d > 0){printf("\nsolutions of the equation are: %f and %f",(-b-sqrt(d))/(2*a),(-b+sqrt(d))/(2*a));}
+    else {(printf("\n solutions of the equation are: %f + %f i and %f + %f i",-b/(2*a),-sqrt(-d)/(2*a),-b/(2*a),sqrt(-d)/(2*a)));};
+
+};
+
+printf("\n");
+
+
+};