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Formatted Input and Output
Example
int i, n;
float f;
double d;
char str[30];
n = scanf("%d %f %lf, %s", &i, &f, &d, &str[0]);
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*
*
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If this call is successful the value of n will be 4
This format expects to see one integer, two floating
point numbers and a string. The first floating point
number is stored in a float and the second one is stored
in a double--weused %lf as the format
If we didn't use the %lf format for d, the value stored in
d would be incorrect
All the parameters have an & so we are passing a
pointer instead of the value. We could replace &str[0]
by str, since str is already a pointer--and this is often
done.
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In addition to scanf() and printf() we have the prototypes:
int fscanf (FILE* fp, const char* format, *arg1, *arg2, ... );
int fprintf (FILE* fp, const char* format, expr1, expr2, .. );
FILE* fp = fopen ("tally.data", "r");
n = fscanf (fp, "%d %f %lf, %s", &i, &f, &d, str);
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