C Exercises: Convert a string to a long integer
C Variable Type : Exercise-3 with Solution
Write a C program to convert a string to a long integer.
Sample Solution:
C Code:
#include<stdio.h>
#include<stdlib.h>
int main ()
{
char buffer[] = "2016 40a0b0 -1101110100110111100110 0x5abfff";
char * ptr_end;
long int i1, i2, i3, i4;
i1 = strtol (buffer,&ptr_end,10);
i2 = strtol (ptr_end,&ptr_end,16);
i3 = strtol (ptr_end,&ptr_end,2);
i4 = strtol (ptr_end,NULL,0);
printf ("\nIn decimals: %ld, %ld, %ld, %ld.\n\n", i1, i2, i3, i4);
return 0;
}
Sample Output:
In decimals: 2016, 4235440, -3624422, 5947391.
Flowchart:
C Programming Code Editor:
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Previous: Write a C program to convert a string to an unsigned long integer.
Next: Write a C program to convert a string to a double.
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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
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