diff --git a/cv3/program.c b/cv3/program.c
new file mode 100644
index 0000000..017d278
--- /dev/null
+++ b/cv3/program.c
@@ -0,0 +1,57 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+#define SIZE_OF_ARRAY 100
+#define LINE_SIZE 2
+
+int main()
+{
+    float result_of_main;
+    float x,a,b,c;
+    int result=reading_input(&x);
+    if(result==0){
+        printf("x");
+        return 0;
+    }
+    result=reading_input(&a);
+    if(result==0){
+        printf("a");
+        return 0;
+    }
+    result=reading_input(&b);
+    if(result==0){
+        printf("b");
+        return 0;
+    }
+    result=reading_input(&c);
+    if(result==0){
+        printf("c");
+        return 0;
+    }
+    result_of_main=a*(x*x)+b*x+c;
+
+    printf("Vysledok je: %.2f", result_of_main);
+    return 0;
+}
+int reading_input(float *number){
+    char buffer[SIZE_OF_ARRAY];
+    fgets(buffer,SIZE_OF_ARRAY,stdin);
+    for(int j=0; buffer[j]!='\0'; j++){
+        if (buffer[j]>='0'&&buffer[j]<='9') {
+            continue;
+        }
+        if (buffer[j]=='.'||buffer) {
+            continue;
+        }
+        if(buffer[j]=='\n'){
+            buffer[j]='\0';
+            break;
+        }
+        printf("You have entered wrong number.\n");
+        return 0;
+    }
+    *number=atof(buffer);
+    return 1;
+}
+