当我运行这个程序时，除了最后的while循环块之外，所有内容都被执行。任何帮助都将非常感谢。如果基本工资中的输入不是整数，但while循环没有执行，程序应该打印无效。

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<stdbool.h>

bool isInt(char *salary) {
    int i = 0;

    if (salary[0] == '-') {
        i = 1;
    }

    for (; i < strlen(salary); i++) {
        if (salary[i] < '0' || salary[i] > '9') {
            return false;
        }
    }

    return true;
}

struct employee
{
    char name[100];
    char hdate[100];
    int salary;
};

int calc(int a);

void main(){

    int j,i;
    char s2[100];

    printf("enter number of employees: ");
    scanf("%d",&j);
    struct employee s[j];

    printf("\nEnter details of employees: \n\n");
    getchar();
    for (i=0;i<j;i++){

        int n=2;

        printf("Name: ");
        fgets(s[i].name,sizeof(s[i].name),stdin);
        s[i].name[strcspn(s[i].name, "\n")] = '\0';
    

        printf("Hire Date: ");
        fgets(s[i].hdate,sizeof(s[i].hdate),stdin);
        s[i].hdate[strcspn(s[i].hdate, "\n")] = '\0';

        while (n>1)
        {
            printf("Base Salary: ");
            scanf("%d",&s[i].salary);
            sprintf(s2, "%d",s[i].salary);
            if (isInt(s2)) {
                return;
            }
            else {
                printf("Invalid ,Enter a valid Input \n");
            }
        }
    }

    printf("Employee and Salary table\n");
    printf("-----------------------------------------------------\n");
    printf("Name\t\t\tHire Date\t\t\tBase Salary\n\n");
    for (i = 0; i <j; i++)
    {
        printf("%s\t\t\t%s\t\t\t%d\n",s[i].name,s[i].hdate,s[i].salary);
        printf("\nCalculations: \n");
        calc(s[i].salary);
        printf("-----------------------------------------\n");
    }
}

int calc(int a){

    int hra,da,ta,gs,pf,it,ns;

    hra=(24*a)/100;
    da=(15*a)/100;ta=4000;gs=a+hra+da+ta;
    pf=(10*a)/100;it=(5*a)/100;
    ns=gs-pf-it;

    printf("\n\tBasic Salary: %d \n\tHRA: %d \n\tDA: %d \n\tTA: %d \n\tGross Salary: %d \n\tPF: %d \n\tIncome Tax: %d \n\tNet Salary: %d\n\n",a,hra,da,ta,gs,pf,it,ns);

    return 0;
}