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/*
Program# 7
date : 10-12-2008
Product of two real numbers
*/
#include <stdio.h>
main(){
float a,b,c;
printf("\nEnter values for A and B :");
scanf("%f %f",&a,&b);
c=a*b;
printf("A*B is : %f\n",c);
}
output:Enter values for A and B : 4.5 3 A*B is : 13.500000 |
Things to note: 1.The first printf( ) function outputs the message on screen. Using expressions in printf( ) is optional.
2.scanf( ) receives input from keyboard, it is a built-in function. The ampersand (&) before the variables in the scanf( ) function is must. & is an 'Address of ' operator, it gives the location number used by variable in memory. When we say &a, we are telling scanf( ) at which memory location should it store the value supplied by the user from the keyboard.
3. A blank, a tab or a new line must separate the values supplied to scanf( )
4.If a integer value is passed, %f in the scanf( ) function converts and stores the given integer value as a float.