Global variables are variables declared outside a function, unlike local variables which are declared inside a function. #include int a = 1; // GLOBAL VARIABLE void main() { int b = 2; // LOCAL VARIABLE printf(“Value of variable ‘a’: %d”, a); printf(“\nValue of variable ‘b’: %d”, b); } When a variable is declared within a
There are three ways to reserve memory space for the storage of information: Use of global variables – the placeholder exists as long as the program is running. Use of local variables – the placeholder only exists while the function that declared the variable is being executed. Reserve a memory space dynamically: request the system,
Pointer is a C language feature that consists of: Pointing to or accessing memory addresses. Access variables that are not accessible in a function. Return one or more values in a function. Among others… How to declare a pointer: Tipo *Variável; Example: #include void main() { int *p, q; q = 1; p = &q;
Simple C program that calculates the factorial of any number: #include int main() { int fat, n; printf(“Enter a value for which you want to calculate your factorial: “); scanf(“%d”, &n); for(fat = 1; n > 1; n = n – 1) fat = fat * n; printf(“\nFactorial calculated: %d”, fat); return 0; } How
