1.
#include<stdio.h>
int main()
{
   char name[100];
   printf("input any char : ");
   gets(name);

   for(int i=0;name[i] !='\0';i++){
    printf("%c",name[i] + 1);

   }
   return 0;
}


2.
#include<stdio.h>
void main()
{
    int marks;
    printf("Enter marks : ");
    scanf("%d",&marks);
    if(marks<0 || marks>100)
    {
        printf("Wrong Entry");
    }
    else if(marks<40)
    {
        printf("Grade: F\nGPE: 0.00\nRemarks:Fail");
    }
    else if(marks>=40 && marks<45)
    {
        printf("Grade: D\nGPE: 2.00\nRemarks:Pass");
    }
    else if(marks>=45 && marks<50)
    {
        printf("Grade: C\nGPE: 2.25\nRemarks:Below Average");
    }
    else if(marks>=50 && marks<55)
    {
        printf("Grade: C+\nGPE 2.50\nRemarks:Average");
    }
    else if(marks>=55 && marks<60)
    {
        printf("Grade: B-\nGPE: 2.75\nRemarks:Above Average");
    }
    else if(marks>=60 && marks<65)
    {
        printf("Grade: B\nGPA: 3.00\nRemarks:Satisfactory");
    }
    else if(marks>=65 && marks<70)
    {
        printf("Grade: B+\nGPA: 3.25\nRemarks:Good");
    }
    else if(marks>=70 && marks<75)
    {
        printf("Grade: A-\nGPE: 3.50\nRemarks:Very good");
    }
    else if(marks>=75 && marks<80)
    {
        printf("Grade: A\nGPE: 3.75\nRemarks:Excellent");
    }
    else
    {
        printf("Grade: A+\nGPE: 4.00\nREmarks:Outstanding");
    }
}

//Loop problem
1.
 #include <stdio.h>
int main() {
    int n, i;
    printf("Enter an integer: ");
    scanf("%d", &n);
    for (i = 1; i <= 10; ++i) {
        printf("%d * %d = %d \n", n, i, n * i);
    }
    return 0;
}
//ARRAY
1.
 #include<stdio.h>

int main()
{
int a[50],i,n,large,small;
printf("\nEnter the number of elements : ");
scanf("%d",&n);
printf("\nInput the array elements : ");
for(i=0;i<n;++i)
scanf("%d",&a[i]);

large=small=a[0];

for(i=1;i<n;++i)
{
if(a[i]>large)
large=a[i];

if(a[i]<small)
small=a[i];
}

printf("\nThe smallest element is %d\n",small);
printf("\nThe largest element is %d\n",large);

return 0;
}
4.
#include <stdio.h>
int main() {
    int n, i;
    float num[100], sum = 0.0, avg;

    printf("Enter the numbers of elements: ");
    scanf("%d", &n);

    while (n > 100 || n < 1) {
        printf("Error! number should in range of (1 to 100).\n");
        printf("Enter the number again: ");
        scanf("%d", &n);
    }

    for (i = 0; i < n; ++i) {
        printf("%d. Enter number: ", i + 1);
        scanf("%f", &num[i]);
        sum += num[i];
    }

    avg = sum / n;
    printf("Average = %.2f", avg);
    return 0;
}