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homework1/Homework1v3.c

+#include <stdio.h>
+#include <math.h> // import of math.h library to use the mathematical features
+int main(){
+// Declaration of the variables
+	float A; // starting value
+	float H; // step
+	float YM;// limit of the function value YM
+	float i;// running variable
+	float X;// abscissa value
+	double Y;//result of the function
+	
+// Input of A, H and YM
+	printf("Enter starting value:    "); 
+	scanf("%f", &A);
+	printf("Enter step size:    "); 
+	scanf("%f", &H);
+	while(H < 0){// repeat the input if H is less than 0
+		printf("Step size must be greater than zero!\n"); 
+		printf("Enter step size again:    ");
+		scanf("%f", &H);
+	}
+	printf("Enter the lower limit of the function value:    "); 
+	scanf("%f", &YM);
+	
+// Calculation of the function, Output
+	printf("x            f(x)\n");// header of the table
+	i = 0;// initialize the running variable
+	Y = 1.7 * pow(10, 208);//max value of Y
+	while(i <= 14){
+		X = A + H * i;// calculate abscissa value
+		printf("%f     ", X);// print abscissa value
+		if(0 < X && X <= 2){// if the X value is within the limit values
+			/*calculate the function with the 
+			 * previously calculated x value using the math.h library */
+			Y = 1 - ((1 - pow((4 - pow(X, 2)), 0.5)) / (40 * pow(X, 2) + pow(X, 0.5)));
+			if(YM > Y){/* if the limit of the function valuel
+						*is greater than the result of the function */
+				printf("The lower limit of the function value is reached!");
+				break;// end the loop
+			}	
+			printf("%f\n", Y);// print the result of the function
+		}else if(X == 0){// in this case Y is infinite
+			printf("not avilable!\n");
+		}else{// in this case Y is complex
+			printf("complex number!\n");
+		}		
+		i += 1;// increase the running variable by 1
+	}	
+	
+	
+	return 0;
+}
+