Use pointer as function argument Dry Run in C

Use pointer as function argument is an interactive C dry run visualizer from the Pointersfunctions programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

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Use pointer as function argument Program Code

#include <stdio.h>

// Function that returns multiple values via pointers
void getMinMax(int *arr, int size, int *min, int *max) {
    int i;
    *min = arr[0];
    *max = arr[0];
    for(i = 1; i < size; i++) {
        if(arr[i] < *min) *min = arr[i];
        if(arr[i] > *max) *max = arr[i];
    }
}

// Function that returns both quotient and remainder
void divide(int dividend, int divisor, int *quotient, int *remainder) {
    *quotient = dividend / divisor;
    *remainder = dividend % divisor;
}

// Function that processes string and returns length and vowel count
void analyzeString(char *str, int *length, int *vowelCount) {
    char c;
    *length = 0;
    *vowelCount = 0;
    
    while(*str != '\0') {
        (*length)++;
        c = *str;
        if(c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u' ||
           c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U') {
            (*vowelCount)++;
        }
        str++;
    }
}

int main() {
    int numbers[] = {45, 23, 89, 12, 67, 34, 91, 56};
    int size = sizeof(numbers)/sizeof(numbers[0]);
    int min, max;
    
    getMinMax(numbers, size, &min, &max);
    printf("Array min: %d, max: %d\n", min, max);
    
    int quotient, remainder;
    divide(17, 5, &quotient, &remainder);
    printf("\n17 / 5 = %d remainder %d\n", quotient, remainder);
    
    char str[] = "Hello World Programming";
    int len, vowels;
    analyzeString(str, &len, &vowels);
    printf("\nString: \"%s\"\n", str);
    printf("Length: %d, Vowels: %d\n", len, vowels);
    
    return 0;
}

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