Last Updated on 4 weeks by Shaikh Mainul Islam

include

include

include

define MAX 1000

char textStack[MAX];
int top = -1;

char undoStack[MAX];
int undoTop = -1;

// Push character to text stack
void typeChar(char ch) {
if (top < MAX – 1) {
textStack[++top] = ch;
undoStack[++undoTop] = ch; // Save to undo stack
} else {
printf(“Text stack full!\n”);
}
}

// Undo last character
void undo() {
if (undoTop >= 0) {
top–; // Just remove last character from text
undoTop–; // Remove from undo stack
} else {
printf(“Nothing to undo.\n”);
}
}

// Print current text
void printText() {
printf(“Current Text: “);
for (int i = 0; i <= top; i++) {
printf(“%c”, textStack[i]);
}
printf(“\n”);
}

// Main function
int main() {
int choice;
char ch;

while (1) {
    printf("\n1. Type Character\n2. Undo\n3. Show Text\n4. Exit\nChoose: ");
    scanf("%d", &choice);

    switch (choice) {
        case 1:
            printf("Enter character: ");
            scanf(" %c", &ch);
            typeChar(ch);
            break;
        case 2:
            undo();
            break;
        case 3:
            printText();
            break;
        case 4:
            exit(0);
        default:
            printf("Invalid choice.\n");
    }
}

return 0;

}