Increment/decrement pointer Dry Run in C

Increment/decrement pointer is an interactive C dry run visualizer from the Pointersintro programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

This page provides a browser-based dry run with source-code highlighting, auto-scroll, voice narration controls, and execution output for learning the program step by step.

Increment/decrement pointer Program Code

#include <stdio.h>
int main() {
    int arr[] = {10, 20, 30, 40, 50};
    int *ptr = arr;  // Points to first element
    
    printf("ptr = %p, *ptr = %d\n", ptr, *ptr);
    
    ptr++;  // Move to next integer
    printf("After ptr++: ptr = %p, *ptr = %d\n", ptr, *ptr);
    
    ptr += 2;  // Move forward 2 positions
    printf("After ptr+=2: ptr = %p, *ptr = %d\n", ptr, *ptr);
    
    ptr--;  // Move back 1 position
    printf("After ptr--: ptr = %p, *ptr = %d\n", ptr, *ptr);
    
    return 0;
}

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