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Lab9/task1and2.c

+#include <stdio.h>
+float multiply(float a, float b);
+float divide(float a, float b);
+float add(float a, float b);
+float subst(float a, float b);
+float minval(float array[], int i);
+float maxval(float array[], int i);
+float avgval(float array[], int i);
+
+int main(){
+	int choice,
+		i,
+		j;
+	float a,
+		  b,
+		  c;
+	puts("input 1 to do simple arithmetic, input anything else to find min/max/avg value of series");
+	scanf("%d", &i);
+	if(i == 1){
+		puts("input first number");
+		scanf("%f", &a);
+		puts("input second number");
+		scanf("%f", &b);
+		puts("input 1 for multiplication, 2 for division, 3 for addition and 4 for substraction");
+		scanf("%d", &choice);
+		while(i == 1){
+			switch(choice){	
+				case 1:
+					c = multiply(a, b);
+					printf("result is %f\n", c);
+					i = 0;
+					break;
+				case 2:
+					c = divide(a, b);
+					printf("result is %f\n", c);
+					i = 0;
+					break;
+				case 3:
+					c = add(a, b);
+					printf("result is %f\n", c);
+					i = 0;
+					break;
+				case 4:
+					c = subst(a, b);
+					printf("result is %f\n", c);
+					i = 0;
+					break;
+				default:
+					puts("what");
+					scanf("%d", &choice);
+					break;
+			}
+		}
+	}else{
+		puts("enter the length of the series");
+		scanf("%d", &i);
+		float numbers[i];
+		puts("fill the series with numbers");
+		for(j = 0; j < i; j++){
+			printf("%d. number is ", j + 1);
+			scanf("%f", &numbers[j]);
+		}
+		puts("input 1 to find maxvalue of the series, 2 to find minvalue, anything else to find the average value of the series");
+		scanf("%d", &choice);
+		switch(choice){
+			case 1:
+				c = maxval(numbers, i);
+				printf("result is %f\n", c);
+				break;
+			case 2:
+				c = minval(numbers, i);
+				printf("result is %f\n", c);
+				break;
+			default:
+				c = avgval(numbers, i);
+				printf("result is %f\n", c);
+				break;
+		}
+		
+	}	
+	return 0;
+}
+float multiply(float a, float b){
+	float c = a*b;
+	return c;
+}
+float divide(float a, float b){
+	float c = a / b;
+	return c;
+}
+float add(float a, float b){
+	float c = a + b;
+	return c;
+}
+float subst(float a, float b){
+	float c = a - b;
+	return c;
+}
+float minval(float array[], int i){
+	float highscore = array[0];
+	int j;
+	for(j = 1; j < i; j++){
+		if(highscore > array[j]){
+			highscore = array[j];
+		}
+	}
+	return highscore;
+}
+float maxval(float array[], int i){
+	float highscore = array[0];
+	int j;
+	for(j = 1; j < i; j++){
+		if(highscore < array[j]){
+			highscore = array[j];
+		}
+	}
+	return highscore;
+}
+float avgval(float array[], int i){
+	float sum = 0;
+	int j;
+	for(j = 0; j < i; j++){
+		sum += array[j];
+	}
+	sum = sum / i;
+	return sum;
+}