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Task1.c

+#include <stdio.h>
+#include <math.h>
+int add(int m, int n);
+int subtraction(int m, int n);
+int multiplication(int m, int n);
+float division(float m, float n);
+
+int main()
+{
+    int m, n;
+    int sum;
+    int subtract;
+    int multiply;
+    float divide;
+    int op;
+
+    printf("Enter the values of m & n: ");
+    scanf("%d %d", &m, &n);
+    printf("1.Addition\n2.subtraction\n3.multiplication\n4.division\n");
+    printf("Enter your Choice : ");
+    scanf("%d", &op);
+    switch (op)
+    {
+    case 1:
+
+        sum = add(m, n);
+        printf("%d", sum);
+        break;
+
+    case 2:
+
+        subtract = subtraction(m, n);
+        printf("%d", subtract);
+        break;
+
+    case 3:
+
+        multiply = subtraction(m, n);
+        printf("%d", multiply);
+        break;
+
+    case 4:
+
+        divide = division(m, n);
+        printf("%f", divide);
+        break;
+
+    default:
+        printf(" Enter Your Correct Choice.");
+        break;
+    }
+    return 0;
+}
+
+int add(int m, int n)
+{
+    int output;
+    output = m + n;
+
+    return output;
+}
+int subtraction(int m, int n)
+{
+    int output;
+    output = m - n;
+
+    return output;
+}
+int multiplication(int m, int n)
+{
+    int output;
+    output = m * n;
+
+    return output;
+}
+float division(float m, float n)
+{
+    float output;
+    output = m / n;
+
+    return output;
+}