Convert integer into string (manual logic) Dry Run in C

Convert integer into string (manual logic) is an interactive C dry run visualizer from the String Functions 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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Convert integer into string (manual logic) Program Code

#include <stdio.h>

void intToString(int num, char str[]) {
    int i = 0;
    int isNegative = 0;
    
    // Handle 0 separately
    if(num == 0) {
        str[i++] = '0';
        str[i] = '\0';
        return;
    }
    
    // Handle negative numbers
    if(num < 0) {
        isNegative = 1;
        num = -num;
    }
    
    // Extract digits in reverse order
    char temp[100];
    int j = 0;
    while(num > 0) {
        temp[j++] = (num % 10) + '0';
        num = num / 10;
    }
    
    // Add negative sign if needed
    if(isNegative) {
        str[i++] = '-';
    }
    
    // Reverse digits to correct order
    for(k = j - 1; k >= 0; k--) {
        str[i++] = temp[k];
    }
    str[i] = '\0';
}

int main() {
    int num1 = 12345;
    int num2 = -6789;
    int num3 = 0;
    char result[100];
    
    intToString(num1, result);
    printf("%d as string: '%s'\n", num1, result);
    
    intToString(num2, result);
    printf("%d as string: '%s'\n", num2, result);
    
    intToString(num3, result);
    printf("%d as string: '%s'\n", num3, result);
    
    return 0;
}

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