homework.c

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
int demo1(){
    int i;
    printf("#######################\n");
    printf("#  Insert Employees   #\n");
    printf("#######################\n");
    char genders[3][400] = {};
    char age[3][400] = {};
    char tel[3][400] = {};
    int salary[3][400] = {};
    for(i = 0; i < 3; i++){
        printf("Insert Employee No.%d\n",i + 1);
        printf("Enter Gender [M or F]: ",i);
        scanf("%s",&genders[i]);
        printf("Enter Age: ",i);
        scanf("%s",&age[i]);
        printf("Enter Telephone: ",i);
        scanf("%s",&tel[i]);
        printf("Enter Salary: ",i);
        scanf("%s",&salary[i]);
        if(i == 2){
            for(i = 0; i < 3; i++){
                if(i == 0) {
                    printf("\n");
                    printf("\n");
                    printf("\n#######################\n");
                }
                printf("#    Employee No.%d    #\n",i +1 );
                printf("    Age: %s\n",age[i]);
                printf("    Gender: %s\n",genders[i]);
                printf("    Telephone: %10s\n",tel[i]);
                printf("    Salary: %s\n",salary[i]);
                printf("#######################\n");
            }
        }
    }
}
int demo2(){
    float x,y,z;
    printf("Please enter x: ");
    scanf("%f",&x);
    printf("Please enter y: ");
    scanf("%f",&y);
    printf("Please enter z: ");
    scanf("%f",&z);
    printf("\n X= %f Y=%f Z=%f\n",x,y,z);
    int options; // 0 = 2.1 1 = 2.2
    printf("Select mathematical expression between 2.1 or 2.2 (1 or 2): ");
    scanf("%d",&options);
    if(options == 1){
            float result = (x*y) +3 - (7-z);
        printf("Result is => %.2f\n",result);
    }else{
        x = x*x;
       float result2 = 3*x + 2*y - 7*z;
       printf("Result is => %.2f\n",result2);
    }
}
int demo3(){
    int sum1,sum2;
    float x,y,z;
    printf("Please enter x , y , z : ");
    scanf("%f %f %f",&x,&y,&z);
    sum1 = (((x * x * x)+(y * y))/(3 * z - 4)) + 2 * x;
    sum2 = ((-4 * x)+(20 * y)) * z;
    printf("First equation result : %.2f\n",sum1);
    printf("Second equation result : %.2f",sum2);
}
int calculator(){
    int price = 0,good = 0,amount = 0;
    printf("Please enter the price of goods: ");
    scanf("%d",&good);
    printf("Please enter the price of pay: ");
    scanf("%d",&price);
    amount = price-good ;
    printf("Charge amount : %d",amount);
    printf("\n500 Bath : %d",amount /500);
    amount = amount - (500 * (amount /500));
    printf("\n100 Bath : %d",amount/100);
    amount = amount - (100 * (amount /100));
    printf("\n50 Bath : %d",amount/50);
    amount = amount - (50 * (amount /50));
    printf("\n20 Bath : %d",amount/20);
    amount = amount - (20 * (amount /20));
    printf("\n10 Bath : %d",amount/10);
    amount = amount - (10 * (amount /10));
    printf("\n5 Bath : %d",amount/5);
    amount = amount - (5 * (amount /5));
    printf("\n1 Bath : %d",amount/1);
    amount = amount - (1 * (amount /1));
}

int main()
{
   // demo1();
   // demo2();
   // calculator();
    return 0;
}