In my code the output is coming "Time limit exceeded" how can I make it more efficient

Question

code for finding if the number is prime,if it's reverse is prime & if all the digits are prime
⬇️⬇️code link⬇️⬇️
https://code.sololearn.com/cUX4IyPjluIt/?ref=app

Answer 1

thanks its runin' perfectly

Answer 2

inside rev function
check the statement
for(;a > 0;)

it's infinite loop
-- ======================
Make it as follow :

int rev(int a){
int g;

while(a != 0)
{
g = g*10 + (a%10);
a /= 10;
}
return g;
}