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Lab9/1.c

+
+
+
+#include <stdio.h>
+float add(int x, int y);
+float substract(int x, int y);
+float mult(int x, int y);
+float division(float x, float y);
+int main()
+{
+	int choice,a,b;
+	float result;
+
+	puts("pick first number");
+	scanf("%d", &a);
+	puts("pick second number");
+	scanf("%d", &b);
+	
+	puts("What do you want to do with numbers?");
+	puts("for addition write 1 ");
+	puts("for division write 2 ");
+	puts("for subtraction write 3 ");
+	puts("for multiplication write 4 ");
+	do{
+		puts("make a choice ");
+		scanf("%d", &choice);
+	}while(choice < 1 || choice > 4);
+
+	switch(choice){
+		
+		case 1:
+			result=add(a,b);
+			break;
+		case 2:
+			if ( b==0 ){
+				printf("it is impossible to divide by zero");
+			}else{
+				result=division(a, b);
+			}
+			break;
+		case 3:
+			result=substract(a, b);
+			break;
+		case 4: 
+			 result=mult(a,b);
+			break;
+		
+		}
+		printf("%f",result);
+	return 0;
+}
+
+float  add(int x, int y){
+	return(x+y);
+	}
+
+
+float substract(int x, int y){
+	return(x-y);
+	}
+float mult(int x, int y){
+	return(x*y);
+	}
+float division(float x, float y){
+	
+	return(x/y);
+	}
+