C Flag Function Usage Guide

In C programming, the flag function is typically a customized function used to set a flag to represent a certain condition or state. Its usage can vary depending on specific requirements, but generally, the flag function takes a parameter to set the value of the flag and then uses this flag in the program to determine a condition or perform an operation.

For example, a simple flag function could look like this:

void setFlag(int value) {
    static int flag = 0;
    flag = value;
}

int main() {
    setFlag(1); //设置标志位为1
    if (flag) {
        printf("Flag is set\n");
    } else {
        printf("Flag is not set\n");
    }

    return 0;
}

In this example, the setFlag function is used to set a flag, which is then utilized in the main function for conditional checking. The specific usage of the flag function may vary depending on the actual application scenario and requirements.