Question

algorithm and flow chart for program


#include <stdio.h>
int main()
{
int n, k, i, j;
char s[100001];
scanf("%d %d", &n, &k);
scanf("%s", s);
for (i = 0; i < n - 1; i++)
{
if (k == 0)
break;
if (s[i] == '4' && s[i + 1] == '7')
{
if (i % 2 == 0)
{
s[i + 1] = '4';
k--;
}.
else
{
s[i] = '7';
if (s[i - 1] == '4')
{
if (k % 2 == 0) s[i] = '4';
k = 0;
break;
}
k--;
}
}
}

printf("%s\n", s);
return 0;
}​

Answer 1

Answer:

The body of the loop is entered only if the test_expression evaluates to True . After one iteration, the test expression is checked again. This process continues until the test_expression evaluates to False . In Python, the body of the while loop is determined through indentation.