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education/software development/ECE1400/C.md
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@ -57,7 +57,19 @@ Read value(s) from stdin.
`scanf` is to stdin as `printf` is to stdout. `scanf` is to stdin as `printf` is to stdout.
The format of the input is specified using [formatting specifiers](#Formatting%20specifiers), and all following arguments are pointers pointing to variables to update. The format of the input is specified using [formatting specifiers](#Formatting%20specifiers), and all following arguments are pointers pointing to variables to update.
### Examples ### Examples
```c
// Read a float from standard input into the variable `v`.
float v;
// Here, `v` is uninitialized
scanf("%f", &v);
printf("You input: %f", v);
```
The validity of a `scanf` call is not necessarily checked at compile time, and so the number of outputs specified should match the number of inputs. ### Behavior
The validity of a `scanf` call is not necessarily checked at compile time, and so the number of outputs specified should match the number of inputs.
For each formatting specifier specified in the string, `scanf` will attempt to locate an appropriate value in the input, skipping whitespace and newlines if necessary. As `scanf`