#include <cs50.h>
#include <stdio.h>
int main(void)
{
string name = get_string("What's your name?");
printf("hello,%s\n", name);
}
this version of Mario if feeling more comfortable：
#include <cs50.h>
#include <stdio.h>
int main(void)
{
int H;
do
{
H = get_int("Height: ");
}
while (H < 1 || H > 8);
for (int i = 0; i < H; i++)
{
for (int m = H - i - 1; m != 0; m--)
{
printf(" ");
}
for (int j = H - i - 1; j < H; j++)
{
printf("#");
}
printf(" ");
for (int n = H - i - 1; n < H; n++)
{
printf("#");
}
printf("\n");
}
}Credit if feeling more comfortable：
#include <cs50.h>
#include <stdio.h>
int main(void)
{
long number;
number = get_long("Number: ");
int I = number / 10.e14;
int A = number / 10.e13;
int V = number / 10.e11;
int A_1 = number / 10000000000000 % 10;
int M_1 = number / 100000000000000 % 10;
if (I == 4)
{
int n16 = number % 10;
int n15 = number / 10 % 10;
int n14 = number / 100 % 10;
int n13 = number / 1000 % 10;
int n12 = number / 10000 % 10;
int n11 = number / 100000 % 10;
int n10 = number / 1000000 % 10;
int n9 = number / 10000000 % 10;
int n8 = number / 100000000 % 10;
int n7 = number / 1000000000 % 10;
int n6 = number / 10000000000 % 10;
int n5 = number / 100000000000 % 10;
int n4 = number / 1000000000000 % 10;
int n3 = number / 10000000000000 % 10;
int n2 = number / 100000000000000 % 10;
int n1 = number / 1000000000000000 % 10;
int m15 = n15 * 2;
if (m15 > 9)
{
m15 = m15 % 10 + m15 / 10;
}
int m13 = n13 * 2;
if (m13 > 9)
{
m13 = m13 % 10 + m13 / 10;
}
int m11 = n11 * 2;
if (m11 > 9)
{
m11 = m11 % 10 + m11 / 10;
}
int m9 = n9 * 2;
if (m9 > 9)
{
m9 = m9 % 10 + m9 / 10;
}
int m7 = n7 * 2;
if (m7 > 9)
{
m7 = m7 % 10 + m7 / 10;
}
int m5 = n5 * 2;
if (m5 > 9)
{
m5 = m5 % 10 + m5 / 10;
}
int m3 = n3 * 2;
if (m3 > 9)
{
m3 = m3 % 10 + m3 / 10;
}
int m1 = n1 * 2;
if (m1 > 9)
{
m1 = m1 % 10 + m1 / 10;
}
int sum_1 = m1 + m3 + m5 + m7 + m9 + m11 + m13 + m15;
int sum_2 = n16 + n14 + n12 + n10 + n8 + n6 + n4 + n2;
int sum = sum_1 + sum_2;
if (sum % 10 == 0)
{
printf("VISA\n");
}
else
{
printf("INVALID\n");
}
}
else if ((I == 2 || I == 5) && (M_1 == 1 || M_1 == 2 || M_1 == 3 || M_1 == 4 || M_1 == 5))
{
int n16 = number % 10;
int n15 = number / 10 % 10;
int n14 = number / 100 % 10;
int n13 = number / 1000 % 10;
int n12 = number / 10000 % 10;
int n11 = number / 100000 % 10;
int n10 = number / 1000000 % 10;
int n9 = number / 10000000 % 10;
int n8 = number / 100000000 % 10;
int n7 = number / 1000000000 % 10;
int n6 = number / 10000000000 % 10;
int n5 = number / 100000000000 % 10;
int n4 = number / 1000000000000 % 10;
int n3 = number / 10000000000000 % 10;
int n2 = number / 100000000000000 % 10;
int n1 = number / 1000000000000000 % 10;
int m15 = n15 * 2;
if (m15 > 9)
{
m15 = m15 % 10 + m15 / 10;
}
int m13 = n13 * 2;
if (m13 > 9)
{
m13 = m13 % 10 + m13 / 10;
}
int m11 = n11 * 2;
if (m11 > 9)
{
m11 = m11 % 10 + m11 / 10;
}
int m9 = n9 * 2;
if (m9 > 9)
{
m9 = m9 % 10 + m9 / 10;
}
int m7 = n7 * 2;
if (m7 > 9)
{
m7 = m7 % 10 + m7 / 10;
}
int m5 = n5 * 2;
if (m5 > 9)
{
m5 = m5 % 10 + m5 / 10;
}
int m3 = n3 * 2;
if (m3 > 9)
{
m3 = m3 % 10 + m3 / 10;
}
int m1 = n1 * 2;
if (m1 > 9)
{
m1 = m1 % 10 + m1 / 10;
}
int sum_1 = m1 + m3 + m5 + m7 + m9 + m11 + m13 + m15;
int sum_2 = n16 + n14 + n12 + n10 + n8 + n6 + n4 + n2;
int sum = sum_1 + sum_2;
if (sum % 10 == 0)
{
printf("MASTERCARD\n");
}
else
{
printf("INVALID\n");
}
}
else if (A == 3 && (A_1 == 4 || A_1 == 7))
{
int n15 = number % 10;
int n14 = number / 10 % 10;
int n13 = number / 100 % 10;
int n12 = number / 1000 % 10;
int n11 = number / 10000 % 10;
int n10 = number / 100000 % 10;
int n9 = number / 1000000 % 10;
int n8 = number / 10000000 % 10;
int n7 = number / 100000000 % 10;
int n6 = number / 1000000000 % 10;
int n5 = number / 10000000000 % 10;
int n4 = number / 100000000000 % 10;
int n3 = number / 1000000000000 % 10;
int n2 = number / 10000000000000 % 10;
int n1 = number / 100000000000000 % 10;
int m14 = n14 * 2;
if (m14 > 9)
{
m14 = m14 % 10 + m14 / 10;
}
int m12 = n12 * 2;
if (m12 > 9)
{
m12 = m12 % 10 + m12 / 10;
}
int m10 = n10 * 2;
if (m10 > 9)
{
m10 = m10 % 10 + m10 / 10;
}
int m8 = n8 * 2;
if (m8 > 9)
{
m8 = m8 % 10 + m8 / 10;
}
int m6 = n6 * 2;
if (m6 > 9)
{
m6 = m6 % 10 + m6 / 10;
}
int m4 = n4 * 2;
if (m4 > 9)
{
m4 = m4 % 10 + m4 / 10;
}
int m2 = n2 * 2;
if (m2 > 9)
{
m2 = m2 % 10 + m2 / 10;
}
int sum_1 = m2 + m4 + m6 + m8 + m10 + m12 + m14;
int sum_2 = n15 + n13 + n11 + n9 + n7 + n5 + n3 + n1;
int sum = sum_1 + sum_2;
if (sum % 10 == 0)
{
printf("AMEX\n");
}
else
{
printf("INVALID\n");
}
}
else if (V == 4)
{
int n13 = number % 10;
int n12 = number / 10 % 10;
int n11 = number / 100 % 10;
int n10 = number / 1000 % 10;
int n9 = number / 10000 % 10;
int n8 = number / 100000 % 10;
int n7 = number / 1000000 % 10;
int n6 = number / 10000000 % 10;
int n5 = number / 100000000 % 10;
int n4 = number / 1000000000 % 10;
int n3 = number / 10000000000 % 10;
int n2 = number / 100000000000 % 10;
int n1 = number / 1000000000000 % 10;
int m12 = n12 * 2;
if (m12 > 9)
{
m12 = m12 % 10 + m12 / 10;
}
int m10 = n10 * 2;
if (m10 > 9)
{
m10 = m10 % 10 + m10 / 10;
}
int m8 = n8 * 2;
if (m8 > 9)
{
m8 = m8 % 10 + m8 / 10;
}
int m6 = n6 * 2;
if (m6 > 9)
{
m6 = m6 % 10 + m6 / 10;
}
int m4 = n4 * 2;
if (m4 > 9)
{
m4 = m4 % 10 + m4 / 10;
}
int m2 = n2 * 2;
if (m2 > 9)
{
m2 = m2 % 10 + m2 / 10;
}
int sum_1 = m2 + m4 + m6 + m8 + m10 + m12;
int sum_2 = n1 + n3 + n5 + n7 + n9 + n11 + n13;
int sum = sum_1 + sum_2;
if (sum % 10 == 0)
{
printf("VISA\n");
}
else
{
printf("INVALID\n");
}
}
else
{
printf("INVALID\n");
}
}#include <cs50.h>
#include <stdio.h>
int main(void)
{
// TODO: Prompt for start size
int s;
do
{
s = get_int("Start size:");
}
while (s < 9);
// TODO: Prompt for end size
int e;
do
{
e = get_int("End size:");
}
while (e < s);
// TODO: Calculate number of years until we reach threshold
int y = 0;
while (s < e)
{
s = s + (s/3) - (s/4);
y++;
}
// TODO: Print number of years
printf("Years: %i\n",y);
}// Calculate your half of a restaurant bill
// Data types, operations, type casting, return value
#include <cs50.h>
#include <stdio.h>
float half(float bill, float tax, int tip);
int main(void)
{
float bill_amount = get_float("Bill before tax and tip: ");
float tax_percent = get_float("Sale Tax Percent: ");
int tip_percent = get_int("Tip percent: ");
printf("You will owe $%.2f each!\n", half(bill_amount, tax_percent, tip_percent));
}
// TODO: Complete the function
float half(float bill, float tax, int tip)
{
float h = ((bill + bill * (tax / 100.0)) * (1 + tip / 100.0)) / 2.0;
return h;
}
Prime：
#include <cs50.h>
#include <stdio.h>
bool prime(int number);
int main(void)
{
int min;
do
{
min = get_int("Minimum: ");
}
while (min < 1);
int max;
do
{
max = get_int("Maximum: ");
}
while (min >= max);
for (int i = min; i <= max; i++)
{
if (prime(i))
{
printf("%i\n", i);
}
}
}
bool prime(int number)
{
// TODO
if (number == 1)
{
return false;
}
for (int j=2;j < number;j++)
{
if (number%j == 0)
{
return false;
}
}
return true;
}