The N?Pls help for this programing problem in c++,better with some comment about why coding that way,thanks

Problem B: The Numbers Problem Description Write a program to report the number of times a number N appears in another number M. The number N is between 10 and 99, and the number M is between 1000000 and 9999999, inclusively. Input Each line is a test case and there are several cases. For each line, there are two numbers in the input N followed by M Output The output of each test case has only one number in one line, namely the number of times N appears in M. Sample Output 2 4 Sample Input 90 9090999