Convert string to number and number to string using C language

Question

What does string to number and number to string conversion mean in C programming language?

Solution

There are two functions available for conversion. They are -

• sscanf() - Converts string to number
• sprintf () - Used to convert number to string

characters String to number conversion

We can use the sscanf() function to convert a string to a number-

Syntax

sscanf (string name, “control string”,variable list)

Example

#include main (){ char a[20] = “02 01 2010”; int day, mon, yr; clrscr(); sscanf (a, “%d%d %d”, &day, &mon, &yr); printf ( “Day =%d”, day); printf ( “Month = %d”, mon); printf ( “Year = %d”, yr); getch (); }

Output

Day = 02 Month = 01 Year = 2010

Convert number to string

We can usesprintf()function to convert string to number −

Syntax

sprintf ( string name, “control string”, variable list)

Example

#include main (){ char a[50]; int day,mon,yr; day = 02; mon = 01; yr = 2010; crlscr(); sprintf (a, “%d/%d/%d”, day, mon, yr); printf ( “today’s date =%s”,a); getch (); }

Output

Today’s date is 02/01/2010.

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