| Reading User Values The previous program is good, but it would be better if it read in the values 5 and 7 from keyboard that is typed by the user instead of using constants. This is the program: #include <stdio.h> int main() { int d,e,f; printf("Enter the first value:"); scanf("%d", &d); printf("Enter the second value:"); scanf("%d", &e); f=d+e; printf("%d + %d = %d\n", d,e,f); getchar(); getchar(); return 0; } |
| Just by using command ‘scanf’ the Processor immediately read typed character from the keyboard. The character typed will be stored in variable d and e. & is the address operator in C: It returns the address of the variable. You must use the & operator in scanf on any variable of type char, int, or float. If you leave out the & operator, there is no error when you compile the program but you will get an error when you run the program. There error as shown above is 4 + 5 = 4206601. This is due to missing & operator for variable d. |
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