View difference between Paste ID: c4ruGkp0 and TBbN3Kfn

 /* C programme to creat simple calculator */
 #include <stdio.h>
 float add(float a,float b);
 float substract(float a,float b);
 float multiply(float a,float b);
 float divide(float a,float b);
 int main(void)
 {
      float num1,num2;
      float w,result=6;
      char ch,c;
      printf("Enters two numbers to add,substract,multiply or divide\n");
      scanf("%f %f",&num1,&num2);
      printf("enter a to add, s to substract ,m to multiply,d to divide\n");
      scanf("%c %c",&c,&ch);
      if(ch=='a'||ch=='A')
      {
          result=add(num1,num2);
          printf("%f\n",result);
      }
      else if(ch=='s'||ch=='S')
      {
          result=substract(num1,num2);
          printf("%f\n",result);
      }
      else if(ch=='m'||ch=='M')
      {
          result=multiply(num1,num2);
          printf("%f\n",result);
      }
      else if(ch=='d'||ch=='D')
      {
          result=divide(num1,num2);
          printf("%f\n",divide(num1,num2));
      }
      else
      {
          printf("please input the correct character\n");
      }
      return 0;
 }
 float add(float a,float b)
 {
      float add;
      add=a+b;
      return add;
 }
 float substract(float a,float b)
 {
      float substract;
      substract=a-b;
      return substract;
 }
 float multiply(float a,float b)
 {
      float multiply;
      multiply=a*b;
      return multiply;
 }
 float divide(float a,float b)
 {
      float divide;
      divide=(float)a/(float)b;
      return divide;
 }