Time.c

//3
#include <stdio.h>
#include <stdio.h>

typedef struct{
    unsigned hour;
    unsigned min;
    unsigned sec;
}time;

void read(time*t){
    printf("Enter hours: ");
    scanf("%u",&t->hour);

    printf("Enter minutes: ");
    scanf("%u",&t->min);

    printf("Enter seconds: ");
    scanf("%u",&t->sec);
}

void display(time*t){
    crt(t);
    printf("TIME:\n%02d:%02d:%02d\n",t->hour,t->min,t->sec);
}

void crt(time*t){
    if(t->hour>=24){
        t->hour=t->min=t->sec=0;
    }
    if(t->min>=60){
        t->hour+=t->min/60;
        t->min%=60;
    }
    if(t->sec>=60){
        t->min+=t->sec/60;
        t->sec%=60;
    }
}

void update(time*t){
    t->sec+=1;
    printf("Time Updated...\n");
}

void add(time*t){
    printf("FOR TIME-1:\n");
    read(t);
    int t1hour=t->hour,t1min=t->min,t1sec=t->sec;
    printf("FOR TIME-2:\n");
    read(t);
    int t2hour=t->hour,t2min=t->min,t2sec=t->sec;

    t->hour=t1hour+t2hour;
    t->min=t1min+t2min;
    t->sec=t1sec+t2sec;

    printf("Addition of two times is accomplished...\n");
}

void main(){
    time*t=(time*)malloc(sizeof(time));
    if(t==NULL){
        printf("Memoer allocation failed...\n");
        return;
    }
    int ch;
    for(;;){
        printf("\nENTER:\n1. To Read\n2. To Display\n3. To Update\n4. To Add two times\n0. To Exit\nEnter your choice from above: ");
        scanf("%d",&ch);

        switch(ch){
            case 1:
            read(t);
            break;

            case 2:
            display(t);
            break;

            case 3:
            update(t);
            break;

            case 4:
            add(t);
            break;

            case 0:
            free(t);
            printf("Exiting...\n");
            exit(0);

            default:
            printf("Invalid Choice! Please Enter Again...\n");

        }
    }  
}