View difference between Paste ID: zzVWDvDa and kZkLqNX4

 #include <stdio.h>
 #include <math.h>
 #include <stdlib.h>
 
 int area_rectang(int base, int height);
 int perim_rectang(int base, int height);
 int area_triang(int base, int height);
 int perim_triang(int side1,int side2,int side3);
 int area_circ(int ratio);
 int perim_circ(int ratio);
 int perim_paral(int base, int height);
 int area_cyl(int ratio, int height);
 int volum_cyl(int ratio, int height);
 int area_sphere(int ratio);
 int volum_sphere(int ratio);
 int area_prism(int lenght,int depth,int height);
 int volum_prism(int lenght, int depth,int height);
 int area_cone(int ratio, int height);
 int volum_cone(int ratio, int height);
 
 
 int main()
 {
     int opc1=0, opt2=0;
-    int base,height,ratio,lenght,side1,side2,side3,depth;
+    int base=0,height=0,ratio=0,lenght=0,side1=0,side2=0,side3=0,depth=0;
 
     printf("Geocalc 1.0\n\n");
 
     do{
-    fflush(stdin);
+    fflush;
     system("cls");
     printf("Selecciona la figura con la que deseas trabajar:\n\n");
     printf("1) Cuadrado o rectangulo\n2) Triangulo\n3) Circulo\n4) Paralelogramo\n5) Cilindro\n6) Esfera\n7) Prisma rectangular\n8) Cono circular\n");
-    scanf("%i",&opc1);
+    scanf("%i%*c",&opc1);
 
     system("cls");
 
     if((opc1>=1)&&(opc1<=8))
      {
      switch(opc1)
      {
 
      /* Rectangle figure*/
      case 1: {printf("\nInserta la medida de la base\n");
-              scanf("%i",&base);
+              scanf("%i%*c",&base);
               printf("\nInserta la medida de la altura\n");
-              scanf("%i",&height);
+              scanf("%i%*c",&height);
               printf("\n\nArea: %i\nPerimetro: %i\n\n",area_rectang(base,height), perim_rectang(base,height));
               break;}
 
     /*Triangle*/
      case 2: {printf("\nInserta la medida de la base\n");
-              scanf("%i",&base);
+              scanf("%i%*c",&base);
               printf("\nInserta la medida de la altura\n");
-              scanf("%i",&height);
+              scanf("%i%*c",&height);
               printf("\nInserta la medida de los tres lados\n");
-              scanf("%i%i%i",&side1,&side2,&side3);
+              scanf("%i%*c %i%*c %i%*c",&side1,&side2,&side3);
               printf("\n\nArea: %i\nPerimetro: %i\n\n",area_triang(base,height),perim_triang(side1,side2,side3));
               break;}
 
      /*Circle*/
      case 3: {printf("\nInserta el radio\n");
-              scanf("%i",&ratio);
+              scanf("%i%*c",&ratio);
               printf("\n\nArea: %i\nPerimetro: %i\n\n",area_circ(ratio),perim_circ(ratio));
               break;}
 
      /*Paralelogram*/
      case 4: {printf("\nInserte la base\n");
-              scanf("%i",&base);
+              scanf("%i%*c",&base);
               printf("\nInserte la altura\n");
-              scanf("%i",&height);
+              scanf("%i%*c",&height);
               printf("\n\nArea: %i\nPerimetro: %i\n\n",area_rectang(base,height),perim_paral(base,height));
               break;}
      /*Cylinder*/
      case 5: {printf("\nInserte el radio\n");
-              scanf("%i",&ratio);
+              scanf("%i%*c",&ratio);
               printf("\nInserte la altura\n");
-              scanf("%i",&height);
+              scanf("%i%*c",&height);
               printf("\n\nArea: %i\nVolumen: %i\n\n",area_cyl(ratio, height),volum_cyl(ratio,height));
               break;}
 
      /*Sphere*/
      case 6: {printf("\n\nInserte el radio\n");
-              scanf("%i",&ratio);
+              scanf("%i%*c",&ratio);
               printf("\n\nArea: %i\nVolumen: %i\n\n",area_sphere(ratio),volum_sphere(ratio));
               break;}
 
      /*Rectangular prism*/
      case 7: {printf("\n\nInserte la longitud\n");
-              scanf("%i",&lenght);
+              scanf("%i%*c",&lenght);
               printf("\nInserte la profundidad\n");
-              scanf("%i",&depth);
+              scanf("%i%*c",&depth);
               printf("\nInserte la altura\n");
-              scanf("%i",&height);
+              scanf("%i%*c",&height);
               printf("\n\nArea: %i\nVolume: %i\n\n",area_prism(lenght,depth,height),volum_prism(lenght,depth,height));
               break;}
 
      /*Circular cone*/
      case 8: {printf("\n\nInserte el radio\n");
-              scanf("%i",&ratio);
+              scanf("%i%*c",&ratio);
               printf("\nInserte la altura\n");
-              scanf("%i",&height);
+              scanf("%i%*c",&height);
               printf("\n\nArea: %i\nVolumen: %i\n\n",area_cone(ratio,height),volum_cone(ratio,height));
               break;}
 
      default: break;}
      }
     else {
           printf("Opcion incorrecta");
           getchar();
-    fflush(stdin);
+
     printf("\n\nDesea realizar otra operacion?  1) Si  2)No\n");
-    scanf("%i",&opt2);
+    scanf("%i%*c",&opt2);
     }while(opt2==1);
     return 0;
 }
 
 //Functions
 /*Area of rectangle*/
 int area_rectang(int base, int height)
 {
   return (base*height);
 }
 
 /*Perimeter of rectangle*/
 int perim_rectang(int base, int height)
 {
   return (2*(base+height));
 }
 
 /*Area of triangle*/
 int area_triang(int base, int height)
 {
   return (base*height)/2;
 }
 
 /*Perimeter of triangle*/
 int perim_triang(int side1,int side2,int side3)
 {
   return (side1+side2+side3);
 }
 
 /*Area of circle*/
 int area_circ(int ratio)
 {
   return M_PI*ratio*ratio;
 }
 
 /*Perimeter of Circle*/
 int perim_circ(int ratio)
 {
   return 2*M_PI*ratio;
 }
 
 
 /*Perimeter of Paralelogram*/
 int perim_paral(int base, int height)
 {
   return (2*base)+(2*height);
 }
 
 /*Area of cylinder*/
 int area_cyl(int ratio, int height)
 {
   return 2*M_PI*ratio*(ratio+height);
 }
 
 /*Volume of cylinder*/
 int volum_cyl(int ratio, int height)
 {
   return M_PI*ratio*ratio*height;
 }
 
 /*Area of sphere*/
 int area_sphere(int ratio)
 {
   return 4*M_PI*ratio*ratio;
 }
 
 /*volume of sphere*/
 int volum_sphere(int ratio)
 {
   return (4/3)*M_PI*pow(ratio,3);
 }
 
 /*Area of rectangular prism*/
 int area_prism(int lenght,int depth,int height)
 {
   return 2*(lenght*depth)+2*(depth*height)+2*(height*lenght);
 }
 
 /*Volume of rectangular prism*/
 int volum_prism(int lenght, int depth, int height)
 {
   return lenght*depth*height;
 }
 
 /*Area of cone*/
 int area_cone(int ratio, int height)
 {
   return M_PI*pow(ratio,2)*sqrt(pow(height,2)+pow(ratio,2));
 }
 
 /*Volume of cone*/
 int volum_cone(int ratio, int height)
 {
   return (M_PI*pow(ratio,2)*height)/3;
 }