<C Primer Plus>3 Arguments and Pitfalls of Printf()

#include <stdio.h>
int main(void){
    int n = 4;
    int m = 5;
    float f = 7.0f;
    float g = 8.0f;

    printf("%d\n", n, m);//too many arguments
    printf("%d %d %d\n", n);//too few arguments
    printf("%d %d \n", f, n);//wrong kinds of values
    return 0;
}

Remeber :

1 C now has a function-prototyping mechanism that checks whether a function call has the correct number and correct kind of arguments . 

2 the Printf() and scanf() take a variable number of arguments.

3 Check too see whether you've used the correct number of printf() arguments ,when  your program doesn't print the expected number of values or unexpected values.