Solution for Exercise 5-1

ex0501

#include <stdio.h>

int main()
{
    printf("The value %d is an integer.\n",986);
    printf("The value %f is a float.\n",98.6);
    return(0);
}

Output

The value 986 is an integer.
The value 98.600000 is a float.

Notes

* Two items are used in both printf() functions that don't display as shown in the source code: conversion characters and escape characters.

* Conversion characters are prefixed by a % (percent sign), escape characters are prefixed by a \ (backslash).

* Conversion characters can also be called placeholders.

* To display a % in a string, you must specify two % characters, %%. Even the pros forget to do that from time to time. So to print 50% you use this statement:

printf("50%%");

Or:

printf("%d%%",50);

* Likewise, to display a \ in a string, you must specify two of them, \\.

Exercise ex0502 →