First.

setuid_elevate.c

+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+int main(int argc, char *argv[],char *envp[]) {
+    char **new_argv = malloc((argc-1) * sizeof(char*));
+    for (int i = 0; i < argc - 1; i++) new_argv[i] = argv[i+1];
+    if (setuid(0))
+    {
+        perror("setuid");
+        return 1;
+    }
+    execve(new_argv[0], &new_argv[0], envp);
+}