C Exercises: Convert a string to an integer

Last update on May 27 2022 12:18:00 (UTC/GMT +8 hours)

C Variable Type : Exercise-13 with Solution

Write a C program to convert a string to an integer.

Sample Solution:

C Code:

#include<stdio.h>
#include<stdlib.h>

int main ()
	{
		int num1;
		char my_array [256];

		printf ("\nInput a number : ");
		fgets (my_array, 256, stdin);

		num1 = atoi (my_array);
		printf ("The value Input is %d.\n\n", num1);

		return 0;
	}

Sample Output:

Input a number : 100                                                                                          
The value Input is 100.

Flowchart:

C Programming Code Editor:

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP